单项选择题
If you find this item too difficult to __________ ,it is advisable to leave as it is and move on to the next one.
A．work out
B．work on
C．work for
D．work at
点击查看答案&解析
<上一题
目录
下一题>
热门
试题
单项选择题
Paul Samuelson revolutionized __________ by presenting his students with the most advanced economic thinking at an introductory level.
A．to teach economics
B．teaching that economics is
C．the teaching of economics
D．economics is taught
点击查看答案&解析
单项选择题
__________ for the timely investment from the general public, our company would not be so thriving as it is.
A．Had it not been
B．Were it not
C．Be it not
D．Should it not be
点击查看答案&解析
相关试题
20（）
19（）
18（）
17（）
16（）