So sudden __________ that the residents had no time to escape.
| A．was the earthquake | B．did the earthquake |
| C．the earthquake did | D．the earthquake was |
Cell phones _______ by more and more teens and many new functions _______ to them nowadays.
| A．are using, have added | B．is used, are adding |
| C．are being used, have been added | D．being used, were added |
— The couple _______ after 10 years’ marriage.
—What a pity. Their child may suffer a lot from this.
| A．broke out | B．broke down | C．broke up | D．broke into |
—I need some fresh air, so I’m going out for a walk.
— _________.
| A．Have fun | B．With pleasure | C．You’d better not | D．It’s none of my business |
The teacher was angry about his being late for class, but he behaved ______ nothing had happened.
| A．as | B．even if | C．as if | D．even though |
Candidates ______ remain in their seats until all the papers have been collected.
| A．must | B．shall | C．may | D．can |