Not until his shoes did he enter one of the rooms of the Japanese house.A. he removes B.

问题补充：

Not until his shoes did he enter one of the rooms of the Japanese house.

A. he removes

B. did he remove

C. he had removed

D. had he removed

答案：

A. he removes

B. did he remove

(答案→)C. he had removed

D. had he removed

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