题目

题型：不详难度：来源：

In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs,...

A．bad for

B．used to

C．used for

D．good at

答案

C

解析

考查词语辨析。be bad for“对…有害”；  be used to do“过去常常做…”  be used for doing “被用来干…” be good at doing“擅长干…”句意为“在古代，狗主要用来帮人们打猎。现在，它们更有用—能帮助盲人，搜寻坏蛋…”故选C。