—________foggy day！
—Something must be done to solve the haze problem．
A．How
B．What
C．What a
–I’m sorry I ___ my exercise book at home just now.
--Don’t forget_____ it to school tomorrow, please.
| A．forget, to take | B．left, to bring |
| C．forgot, to bring | D．left, to take. |
I think everybody should ______ to protect wild animals.
| A．take action | B．act |
| C．do something | D．all the above |
If I don’t buy them, _____ will buy them.
| A．else someone | B．else anyone |
| C．someone else | D．anyone else |
–Mum, must I stay there the whole day?
--No, you ____. You _____ come back after lunch, if you like.
| A．mustn’t, can | B．needn’t, must |
| C．needn’t, may | D．mustn’t, should |
For a long time I found _____ agree with Mum’s ideas.
| A．hard | B．it hard | C．it hard to | D．it is hard to |