The Internet and the effect brought about did a lot of good to our daily life and work. That is to say, the Internet has made a great difference in many aspects.
| A．that | B．what | C．which | D．it |
If you had worked hard, you ______ so anxious now．
| A．are not | B．would not have been | C．will not be | D．would not be |
_____ I’m willing to help, I do not have much time available．
| A．While | B．When | C．Once | D．Since |
The rise of oil prices made scientists search for new energy resources ______ oil．
| A．replace | B．replacing | C．to replace | D．replaced |
You didn’t believe John won the first prize at the speech competition, ______?
| A．did he | B．didn’t he | C．did you | D．didn’t you |
I had reached a point in my career _____ I needed to decide which way to go．
| A．why | B．which | C．when | D．where |