.—How _______the frog(雾) is! We can’t see clearly while riding.
| A．thin | B．fresh | C．thick | D．terrified |
—Where is Tom? We can’t find him anywhere.
—Perhaps he_____ home.
| A．has gone | B．is going | C．went | D．was going |
—It will be my turn. I feel a bit nervous.
— ________. You can make it.
| A．Congratulations | B．Take it easy |
| C．Look out | D．Have a good time |
—Dad, please tell me when Mum_____. I miss her very much.
—She will return when she_____ her task. And she will bring a nice present for you.
| A．returns; finishes | B．returns; will finish |
| C．will return; finishes | D．will return; will finish |
--This is _______ fantastic movie I have ever seen.
--Yes, I’ve never seen a _______ one.
| A．the worst; best | B．the most; better |
| C．the better; best | D．the worse; good |
The rivers will become dirtier and dirtier _______ we take action to protect them.
| A．since | B．if | C．until | D．Unless |