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。