_____________ worries me the way he keeps changing his mind.
| A．This | B．That | C．What | D．It |
It isn’t decided yet __________ a nuclear power station will be built here.
| A．that | B．where | C．what | D．whether |
Joan saw her boyfriend off at the railway station. She waved until the train was _____.
| A．in sight | B．out of sight | C．at first sight | D．lost sight |
The more often one takes exercise, ______ he or she will become.
| A．the strong | B．the stronger | C．more strong | D．more stronger |
—Do you think it’s going to rain over the weekend?
—________.
| A．I don’t believe | B．I don’t believe it | C．I believe not so | D．I believe not |
-----Why didn’t you go to the gathering yesterday?
------It rained so hard and in addition, I ________ an important essay the whole morning.
| A．wrote | B．had written | C．was writing | D．have been writing |