—Mary broke up with me!
—You _____ have forgotten about the Valentine's Day．
| A．shouldn't | B．couldn't | C．needn't | D．mustn't |
The captain gave an order in the difficult situation________the sailors throw away everything that was on board the ship.
| A．what | B．which | C．as | D．that |
Disthinguished guests and friends, welcome to our school! ________the ceremony of the 50th anniversary this morning are our alumni (校友) from home and abroad.
| A．Attend | B．To attend | C．Attending | D．Having attended |
—Can we fix a time for the party?
—We can’t have the party________none of us have any classes.
| A．except | B．except for | C．except when | D．except that |
They finally reached________ they had long dreamed of.
| A．where | B．the place | C．that | D．there where |
If you sleep short of 7 hours, you are three times________ to catch a cold.
| A．possible | B．certainly | C．probable | D．likely |