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 | D．I think which is |
is known to all is that the Diaoyu Islands have belonged to China since ancient times.
| A．As | B．It | C．What | D．That |
Skiing in Taiwan is most of the time because there's very little snow there.
| A．common | B．necessary | C．normal | D．impossible |
Schools in China are required to at least one “Sports Day” per academic year.
| A．set aside | B．set down | C．set out | D．set off |
—May I see your driving license, please?
— ？ Did I do something wrong?
| A．Why not | B．What | C．Who cares | D．So what |
The mother many things to get her daughter a good education.
| A．purchase | B．produce | C．sacrifice | D．store |