By the time John ________ the destination, he ________ for about three hours. A. will get / has walked B. gets / will have been walking C. has got / walks D. is getting / is walking

By the time John ________ the destination, he ________ for about three hours.

A. will get / has walked     
B. gets / will have been walking
C. has got / walks     
D. is getting / is walking

Trả lời

Chọn đáp án B

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