Please call me Mary256-7893.A. inB. atC. toD. of

问题补充：

Please call me Mary256-7893.

A. in

B. at

C. to

D. of

答案：

A. in

(答案→)B. at

C. to

D. of

解析：call sb at +电话号码,打某人电话，号码是……，所以电话号码前介词用at故选B.