单项选择题

The pressure ______causes Americans to be energetic, but it also puts them under a constant emotional strain.

A．to compete
B．competing
C．to be competed
D．having competed
<上一题 目录 下一题>
热门 试题

单项选择题
The people at the party were worried about Susan because no one was aware______ she had gone.
A．where that
B．of where
C．the place where
D．the place
单项选择题
______, I must do another experiment.
A．Be it ever so late
B．It is ever so late
C．It be ever so late
D．So late it be ever
相关试题