They will be able to walk across the river ______      .

Câu hỏi :

They will be able to walk across the river ______      .

A if the ice will be thick enough    

B  unless the ice is thick enough

C  if the ice is thick enough  

D when the ice will be thick enough

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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