. He didn’t know or stay.A. to leaveB. if that he should leaveC. if to leaveD. whether to

问题补充：

. He didn’t know or stay.

A. to leave

B. if that he should leave

C. if to leave

D. whether to leave

答案：

A. to leave

B. if that he should leave

C. if to leave

(答案→)D. whether to leave

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