Question

In ancient times, dogs were mainly ______helping people hunt( 打獵) .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

Answer 1

C

考查詞語辨析。be bad for“對…有害”；  be used to do“過去常常做…”  be used for doing “被用來干…” be good at doing“擅長干…”句意為“在古代，狗主要用來幫人們打獵。現(xiàn)在，它們更有用—能幫助盲人，搜尋壞蛋…”故選C。