Listen! Someone ________ at the door. I ________ it. A. knocks / answer B. has knocked / will be answering C. was knocking / answered D. is knocking / will answer

Listen! Someone ________ at the door. I ________ it.

A. knocks / answer   
B. has knocked / will be answering
C. was knocking / answered    
D. is knocking / will answer

Trả lời

Chọn đáp án D

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