Nội dung bài viết
I. Ôn nhanh dạng bài Matching Sentence Endings
Matching Sentence Endings là dạng bài yêu cầu bạn chọn tiêu đề đúng cho mỗi đoạn văn trong bài thi IELTS Reading. Bài học dưới đây sẽ chỉ ra những bẫy/lỗi sai thường gặp và những tips làm dạng bài này hiệu quả nhé!
II. Chiến lược làm bài
- Đọc phần Incomplete Sentences trước và khoan hãy nhìn vào phần Endings. Sau đó gạch chân các Keywords đặc biệt như tên riêng, địa điểm hoặc ngày tháng.
- Tìm những đoạn chứa thông tin liên quan đến mỗi Incomplete Sentence. Lưu ý các từ đồng nghĩa – Synonyms và các Paraphrases.
- Xem xét các Endings.
- Chọn ra đáp án phù hợp nhất.
- Lặp lại các bước trên cho những Incomplete Sentence tiếp theo.
III. Các bẫy và lỗi sai thường gặp
- Chọn Sentence Endings dựa theo sự kinh nghiệm cá nhân về chủ đề tương tự mà không tìm kiếm thông tin trong bài đọc.
- Chọn những Sentence Endings có chứa những từ giống như trong câu Statement. Tuy nhiên giám khảo sẽ thường sử dụng từ đồng nghĩa hoặc paraphrase câu văn lại.
- Có quá nhiều Sentence Endings không liên quan hoặc có nghĩa hoàn toàn trái ngược với văn bản khiến cho bạn bị rối.
IV. Các tips hay ho và dễ áp dụng
- Đáp án sẽ sắp xếp theo trình tự trong đoạn văn, khi giải quyết được câu hỏi số 1 thì bạn cũng sẽ biết thông tin đáp án cho câu hỏi tiếp theo sẽ xuất hiện kế tiếp nó trong đoạn văn.
- Thử dự đoán phần Ending của mỗi câu Statement trước khi bạn nhìn vào các Endings của đề bài.
- Đừng nên đọc phần Endings trước mà hãy ưu tiên các Incomplete Sentences. Bởi vì, bạn sẽ chỉ tốn thời gian với những Endings thừa trong đề bài.
- Loại trừ những Sentence Endings không hợp với cấu trúc ngữ pháp của câu.
V. Ví dụ + Hướng dẫn giải dạng đề
Animal migration, however it is defined, is far more than just the movement of animals. It can loosely be described as travel that takes place at regular intervals – often in an annual cycle – that may involve many members of a species, and is rewarded only after a long journey. It suggests inherited instinct. The biologist Hugh Dingle has identified five characteristics that apply, in varying degrees and combinations, to all migrations. They are prolonged movements that carry animals outside familiar habitats; they tend to be linear, not zigzaggy; they involve special behaviours concerning preparation (such as overfeeding) and arrival; they demand special allocations of energy. And one more: migrating animals maintain an intense attentiveness to the greater mission, which keeps them undistracted by temptations and undeterred by challenges that would turn other animals aside.
Complete each sentence with the correct ending, A-B, below.
- According to Dingle, migratory routes are likely to
- To prepare for migration, animals are likely to
| A. be discouraged by difficulties.|
B. travel on open land where they can look out for predators
C. eat more than they need for immediate purposes
D. follow a straight line
(Cambridge Practice Tests for IELTS 11, Test 3)
Hướng dẫn làm bài và giải chi tiết:
1. Gạch chân từ khóa ở mỗi Statement
Question 1: According to Dingle, migratory routes are likely to
2. Tìm kiếm đoạn văn chứa thông tin phù hợp:
The biologist Hugh Dingle has identified five characteristics that apply, in varying degrees and combinations, to all migrations. They are prolonged movements that carry animals outside familiar habitats; they tend to be linear, not zigzaggy;
- Migratory (adj) ~ migrations (n)
- Movements = routes
- Likely to = tend to
3. Đọc danh sách các Endings. Ở trong đáp án D, ta có: follow a straight line, có nghĩa giống với linear (a): of or in lines.
Vì vậy, đáp án đúng là D.
4. Áp dụng phương pháp tương tự với Question 2:
Question 2: To prepare for migration, animals are likely to
Tìm đoạn văn chứa thông tin phù hợp:
they involve special behaviours concerning preparation (such as overfeeding) and arrival;
- Overfeeding = eat more than they need
Vì vậy, đáp án đúng là C.
5. Lập bảng từ khóa:
|Key words in passage||Key words in Endings|
|Overfeed||Eat more than they need|
|Likely to||Tend to|
|Migratory (adj)||Migration (n)|
WHEN EVOLUTION RUNS BACKWARDS
Evolution isn’t supposed to run backwards – yet an increasing number of examples show that it does and that it can sometimes represent the future of a species.
The description of any animal as an ‘evolutionary throwback’ is controversial. For the better part of a century, most biologists have been reluctant to use those words, mindful of a principle of evolution that says ‘evolution cannot run backwards. But as more and more examples come to light and modern genetics enters the scene, that principle is having to be rewritten. Not only are evolutionary throwbacks possible, they sometimes play an important role in the forward march of evolution. The technical term for an evolutionary throwback is an ‘atavism’, from the Latin atavus, meaning forefather. The word has ugly connotations thanks largely to Cesare Lombroso, a 19th-century Italian medic who argued that criminals were born not made and could be identified by certain physical features that were throwbacks to a primitive, sub-human state.
While Lombroso was measuring criminals, a Belgian palaeontologist called Louis Dollo was studying fossil records and coming to the opposite conclusion. In 1890 he proposed that evolution was irreversible: that ‘an organism is unable to return, even partially, to a previous stage already realised in the ranks of its ancestors. Early 20thcentury biologists came to a similar conclusion, though they qualified it in terms of probability, stating that there is no reason why evolution cannot run backwards -it is just very unlikely. And so the idea of irreversibility in evolution stuck and came to be known as ‘Dollo’s law.
If Dollo’s law is right, atavisms should occur only very rarely, if at all. Yet almost since the idea took root, exceptions have been cropping up. In 1919, for example, a humpback whale with a pair of leglike appendages over a metre long, complete with a full set of limb bones, was caught off Vancouver Island in Canada. Explorer Roy Chapman Andrews argued at the time that the whale must be a throwback to a landliving ancestor. ‘I can see no other explanation, he wrote in 1921.Since then, so many other examples have been discovered that it no longer makes sense to say that evolution is as good as irreversible. And this poses a puzzle: how can characteristics that disappeared millions of years ago suddenly reappear?
In 1994, Rudolf Raff and colleagues at Indiana University in the USA decided to use genetics to put a number on the probability of evolution going into reverse. They reasoned that while some evolutionary changes involve the loss of genes and are therefore irreversible, others may be the result of genes being switched off. If these silent genes are somehow switched back on, they argued, longlost traits could reappear.
Raff’s team went on to calculate the likelihood of it happening. Silent genes accumulate random mutations, they reasoned, eventually rendering them useless. So how long can a gene survive in a species if it is no longer used? The team calculated that there is a good chance of silent genes surviving for up to 6 million years in at least a few individuals in a population, and that some might survive as long as 10 million years. In other words, throwbacks are possible, but only to the relatively recent evolutionary past.
As a possible example, the team pointed to the mole salamanders of Mexico and California. Like most amphibians these begin life in a juvenile ‘tadpole’ state, then metamorphose into the adult form – except for one species, the axolotl, which famously lives its entire life as a juvenile. The simplest explanation for this is that the axolotl lineage alone lost the ability to metamorphose, while others retained it. From a detailed analysis of the salamanders’ family tree, however, it is clear that the other lineages evolved from an ancestor that itself had lost the ability to metamorphose. In other words, metamorphosis in mole salamanders is an atavism. The salamander example fits with Raff’s 10million-year time frame.
More recently, however, examples have been reported that break the time limit, suggesting that silent genes may not be the whole story. In a paper published last year, biologist Gunter Wagner of Yale University reported some work on the evolutionary history of a group of South American lizards called Bachia. Many of these have minuscule limbs; some look more like snakes than lizards and a few have completely lost the toes on their hind limbs. Other species, however, sport up to four toes on their hind legs. The simplest explanation is that the toed lineages never lost their toes, but Wagner begs to differ. According to his analysis of the Bachia family tree, the toed species re-evolved toes from toeless ancestors and, what is more, digit loss and gain has occurred on more than one occasion over tens of millions of years.
So what’s going on? One possibility is that these traits are lost and then simply reappear, in much the same way that similar structures can independently arise in unrelated species, such as the dorsal fins of sharks and killer whales. Another more intriguing possibility is that the genetic information needed to make toes somehow survived for tens or perhaps hundreds of millions of years in the lizards and was reactivated. These atavistic traits provided an advantage and spread through the population, effectively reversing evolution.
But if silent genes degrade within 6 to million years, how can long-lost traits be reactivated over longer timescales? The answer may lie in the womb. Early embryos of many species develop ancestral features. Snake embryos, for example, sprout hind limb buds. Later in development these features disappear thanks to developmental programs that say ‘lose the leg’. If for any reason this does not happen, the ancestral feature may not disappear, leading to an atavism.
Read the passage below then complete each sentence with the correct ending.
- For a long time biologists rejected
- Opposing views on evolutionary throwbacks are represented by
- Examples of evolutionary throwbacks have led to
- The shark and killer whale are mentioned to exemplify
- One explanation for the findings of Wagner’s research is
(Cambridge Practice Tests for IELTS 10, Test 4)
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