“How about a picnic this weekend？”“________I'm free then.”
| A．Yes, thanks. |
| B．Why not? |
| C．No, I am busy. |
| D．It's a pity. |
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 |
Rod loves ______ clocks. However，he never manages to put them together again.
| A．taking apart |
| B．giving away |
| C．making up |
| D．turning off |