Birds all over the world migrate distances up to________of miles.

Câu hỏi :

Mark the letter A, B, c, or D on your answer sheet to indicate the correct answer to each of the following questions.
Birds all over the world migrate distances up to________of miles.

A. a thousand

B.some thousand

C. thousand

D. thousands

* Đáp án

* Hướng dẫn giải

Đáp án là D. thousands of + N(s): hàng nghìn ....

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