Tom assured (向……保证) his boss that he would _____ all his energies in doing this new job.

题目

Tom assured (向……保证) his boss that he would _____ all his energies in doing this new job.
A.call forth B.call at C.call on D.call off

答案

选A
call forth 唤起；振作起；鼓起；使产生；使起作用
call at 拜访,访问；停靠（车站）
call on 访问,拜访；号召,请求
call off 取消；依次叫名；叫走