________ the Internet is of great help，I don’t think it’s a good idea to spend too much time on it.
| A．If |
| B．While |
| C．Because |
| D．As |
The bus came after I _____ for about half an hour.
| A．had been waiting | B．have been waiting |
| C．have waited | D．was waiting |
I saw that he _____ at seven o’clock last night.
| A．still worked | B．is still working |
| C．was still working | D．had been working |
I didn’t go to see the film because I _____ it.
| A．saw | B．have seen | C．had seen | D．am seeing |
Did you ask the teacher what _____ this afternoon?
| A．will we do | B．we would do | C．shall we do | D．would we do |
Who _____ to school earliest in your class every morning?
| A．comes | B．come | C．will come | D．is coming |