Hardly returned home I realized I had left my key at the office.A. have I; whenB. had I; w

问题补充：

Hardly returned home I realized I had left my key at the office.

A. have I; when

B. had I; when

C. have I; than

D. had I; than

答案：

A. have I; when

(答案→)B. had I; when

C. have I; than

D. had I; than

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