There ______ to have been lots of plants and animals in this area in the past.

Câu hỏi :

There ______ to have been lots of plants and animals in this area in the past.

A is said   

B are said  

C were said  

D was said

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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