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- Did Mike call you yesterday? - No, but this morning he called my office. A. at

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- Did Mike call you yesterday? - No, but this morning he called my office. A. at

— Did Mike call ______you yesterday?

  — No, but this morning he called _______my office.

A. at; on         B. on; on       C. at; at        D. on; at

试题答案

D