When I got to his home he for an hour.A. had leftB. leftC. had been awayD. has been away

问题补充：

When I got to his home, he for an hour.

A. had left

B. left

C. had been away

D. has been away

答案：

A. had left

B. left

(答案→)C. had been away

D. has been away

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