— Is Mr. Smith driving here? —I’m not sure. He come by subway.A. mayB. shallC. need D. m

问题补充：

— Is Mr. Smith driving here?

—I’m not sure. He come by subway.

A. may

B. shall

C. need

D. must

答案：

(答案→)A. may

B. shall

C. need

D. must

解析：句意：——史密斯先生将开车来这儿吗？——我不确定。他可能乘坐地铁来。A. may “可能”，表示没有把握的推测；B. shall将要；C. need 需要，表示必要的；D. must 一定，表示有把握的推测。根据I’m not sure.可知这是没有把握的推测，故用情态动词may。故选A。

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