Mathematics _______ the language of science.
| A．are |
| B．are going to be |
| C．is |
| D．is to be |
The director had her assistant ___ some hot dogs for the meeting.
| A．picked up | B．picks up | C．pick up | D．picking up |
If the weather had been better, we could have had a picnic. But it ____ all day.
| A．rained | B．rains | C．has rained | D．is raining |
——Could I ask you a rather personal question?
——Sure, ____.
| A．pardon me | B．go ahead | C．good idea | D．forget it |
——What are you reading, Tom?
——I’m not really reading, just ___ the pages.
| A．turning off | B．turning around | C．turning over | D．turning up |
It’s not ___ good idea to drive for four hours without ___ break.
| A．a; a | B．the ; a | C．the ; the | D．a ; the |