_______ Tom ________ Mary can help me, for they are very busy. A. Either；or B. Neither；nor C. Both；and D. whether；or

_______ Tom ________ Mary can help me, for they are very busy.

A.
Either；or

B.
Neither；nor

C.
Both；and

D.
whether；or

出自：甘肃开放大学商务英语

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