---- Did Mary come to the party?
---- I don’t know. She _____ while I was out.
| A．might have come | B．might come | C．should have come | D．must have come |
What’s the use of keeping the secret ______ everyone has already known it?
| A．as though | B．now that | C．before long | D．in case |
The party wassuccess．We sang and danced until it came toend at midnight．
| A．a；an | B．a；the | C．the；an | D．／；an |
There is a new problem involved in the popularity of private cars _____________ road
conditions need _______________.
| A．when; improving | B．which; to be improved |
| C．where; improving | D．that; to be improved |
— ______?
— Nothing serious, but a bit tired.
| A．Anything the matter with you | B．Is that all |
| C．Anything else | D．What’s this |
I am not ______ up late.
A. accustomed staying B. accustomed to staying 
used to stay D. addicted to stay