.
He made another wonderful discovery, _______ of great importance to science.
| A．which I think is. | B．which I think it is. |
| C．which I think it. | D．I think which is. |
—I am going to be a volunteer at the Asian Games to be held in Guangzhou this November．
—___! Me, too．
| A．That's it | B．Congratulations | C．No problem | D．That's great |
It is generally considered unwise to give a child ____ he or she wants．
| A．however | B．whatever | C．whichever | D．whenever |
It was __________________ back home from work.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |
They asked the government to make ______clear to the public ______ they did was right.
| A．it; that what | B．it; that | C．that; what | D．this; that |
The reason why he failed is ______ he was too careless.
| A．because | B．that | C．for | D．because of |