单项选择题

Living in the desert of Africa has its problems; obtaining fresh water is not the least.

A．with which
B．for which
C．of which
D．which
<上一题 目录 下一题>
热门 试题

单项选择题
Once the problem of the engine , all other problems will be readily solved.
A．solve
B．solved
C．is solved
D．will be solved
单项选择题
If I had remembered the window, the thief would not have got in.
A．to close
B．closing
C．to have closed
D．having closed
相关试题