▶ Your Answer :
The passage contends that a crest of Lambeosaurus had several roles. However, the lecturer brings up several points that contradict this argument.
First, the professor argues that the crest was used to attract mates. The passage assists that the crest is used to attract mates, based on its different size according to sex and age. However, most reptiles attract their mate by using sound and behavior, not by appearance. For example, cCrocodiles communicate with their mate by lifting their head or making noises. This casts doubt on the passage's claim that the crest used to attract their mates.
Second, the speaker denies that the crest had a role related with combat. The passage suggests that it could be used to protect their head or to attack another one. However, fossils show that the crest is extended to backward, so it could not be used to protect their head. Also, it shows that the crest is hollow, so it is it's too fragile to be used to attack another one.
The final point made by the lecturer is that it was not used to breathing. In the passage, hollow in the crest is connected with its lung, so it could be used to breathing. On the other hand, the crest is too small to supply oxygen to a Lambeosaurus, because it is a massive creature. The hollow does not contain much air, so it could not couldn't support enough air that the dinosaur needs.
Good (26-30)
첫번째 본문 -대소문자 오류
두번째 본문 -축약형 지양해주세요. it's-->it is
세번째 본문 -축약형 지양해주세요. couldn't-->could not
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