He is______an important customer now and he will be back tonight.A.calling onB.calling upC
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He is______an important customer now and he will be back tonight.
A.calling on
B.calling up
C.calling at
D.calling for
请帮忙给出正确答案和分析,谢谢!
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正确答案:A
本题考查动词call与不同介词的搭配。callon指“号召(某人),拜访(某人)”。callup指“打电话给”。callat指“访问(某地)”。callfor指“要求,提倡”。根据句意,故选A。
