Please call Mr. Wu  _____238-8977 and ask him&a Wap版

试题详情及答案解析

Please call Mr. Wu _____238-8977 and ask him help.

A．at, for

B．on, for

C．at,on

D．in,for

答案：A

试题分析：句意：请给吴先生用238897这个号码打电话。向他请求帮助。call sb at+号码，用······号码给某人打电话。ask sb for sth,向某人请求（要）······。结合句意，故选A.
考点：考查介词的用法。