单项选择题
The best way（）the principle is to see how it actually works in practice.
A．understood
B．understand
C．understanding
D．to understand
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
I felt somewhat disappointed and was about to leave（）something occurred which attracted my attention.
A．unless
B．until
C．when
D．while
点击查看答案&解析
相关试题
Where is the mother now（）
What is the probable relationship b...
What did the woman say（）
Which of the statements is true ac...
How long does it take to fly to ...