His mother is ill. He has to ________ her at home.A. look at      B. look afterC

题型：不详难度：来源：

His mother is ill. He has to ________ her at home.

A. look at

B. look after

C. look for

D. look into

答案

B

解析

试题分析：此题重点考查动词短语辨析，look at“看”，表动作；look after“照顾、照看”相当于take care of；look for“寻找”表示找的动作；look into“调查”,根据题意，他妈妈生病了，他必须在家照顾他妈妈，故选B
点评：动词短语在考试中经常出现，要正确区分并运用，尤其是短语中的介词是考查的重点。