问题 选择题

_________ the internet is _________, I do not think it is a good idea to spend too much time on it.

A.When ; helpful

B.As ; great help

C.While ; of great help

D.Now ; of no help

答案

答案:C

考查连词。句中while作“虽然”之意;be of great help =" very" helpful。句意:虽然网络是很有帮助的,但我认为在它上面花太多的时间不是一个好主意。

单项选择题
单项选择题