---The classroom is not________ clean ______it was yesterday .
---Sorry, I forgot to clean it.
| A．as, as | B．so, so |
| C． as, so | D．more, than |
I don’t know if it _______ tomorrow. If it _____, we will go out for a picnic.
| A．will rain； won’t rain |
| B．rains； doesn’t rain |
| C．rains； won’t rain |
| D．will rain； doesn’t rain |
An old man was found ______ in his house. Luckily, he was taken to hospital in time.
| A．dead | B．die | C．dying | D．death |
The old scientist devoted most of his time __________ the space science.
| A．develop | B．to developing |
| C．to develop | D．developing |
—Excuse me, Mum. When can we have dinner?
—Not until it in half an hour.
| A．is prepared | B．will be prepared |
| C．had been prepared | D．was prepared |
— Do you know whose magazine is it?
— I think itbe Lily’s, for we can find her name on the cover.
| A．can | B．might | C．could | D．must |