Câu hỏi :

Whales can move easily in water thanks to their ...............

A. tail and blubber

B. size and head

C. tail and skin

D. skin and head

* Đáp án

C

* Hướng dẫn giải

Dẫn chứng: Whales have tails that end like flippers. With just a gentle flick, it can propel itself forward. 

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