单项选择题

It may be necessary to stop ______ in the learning process and go back to the difficult points in the lessons.

A．at a distance
B．at intervals
C．at ease
D．at length
<上一题 目录 下一题>
热门 试题

单项选择题
The old paper mill has been ______ to make way for a new shopping centre.
A．cut down
B．kept down
C．torn down
D．held down
单项选择题
There's the living room still to be ______ , so that's my next project.

A．abandoned
B．decorated
C．dissolved
D．assessed
相关试题