单项选择题

The task before us ______ great courage and perseverance.

A．calls on
B．calls for
C．calls forth
D．calls up
<上一题 目录 下一题>
热门 试题

单项选择题
The traditional approach ______ with complex problems is to break them down into smaller, more easily managed problems.
A．to dealing
B．in dealing
C．dealing
D．to deal
单项选择题
The professor recommends that we ______ tile experiment until it is carefully designed.
A．don't start
B．not start
C．will not start
D．are not to start
相关试题