He paid for a seat, when he _____ have entered free.
| A．could | B．would | C．must | D．need |
There is no need______，because the flight has been canceled.
| A．hurrying |
| B．hurry |
| C．to hurry |
| D．hurried |
I hear they've promoted Tom，but he didn't mention______ when we talked on the phone.
| A．to promote |
| B．having been promoted |
| C．having promoted |
| D．to be promoted |
Stage fright is a common example of ________educators call a“lack of confidence”among students.
| A．that |
| B．what |
| C．which |
| D．whose |
It's surprising that your brother ______Russian so quickly—he hasn't lived there very long.
| A．picked up |
| B．looked up |
| C．put up |
| D．made up |
He had to pause from time to time to wipe the sweat from his forehead，because the airconditioning system ______.
| A．broke in |
| B．broke up |
| C．broke out |
| D．broke down |