Things are changing all the time. It’s difficult to keep .........................all these changes.     

Câu hỏi :

Things are changing all the time. It’s difficult to keep .........................all these changes.     

A up with 

B out of  

C back from   

D on about

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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