According to scientists (A) who study birds,(B) upon hatching,(C) ducklings have already known to swim.(D)

Câu hỏi :

According to scientists (A) who study birds,(B) upon hatching,(C) ducklings have already known to swim.(D)

A scientists

B birds

C upon hatching

D to swim

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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