He ___ without saying good-bye to them, for he always has good manners.
| A．mustn’t have left | B．may not have left | C．shouldn’t have left | D．can’t have left |
—Shall we go out to the seaside this weekend?
—________ Ring me up at any time.
| A．Hold on，please. | B．What for? |
| C．That depends. | D．Sounds good. |
It was Tom ________ is a soldier ________ saved the little girl from the water yesterday.
| A．that；that | B．whose；whom |
| C．who；who | D．that；who |
The government has made laws to protect animals，so the number of the endangered animals ________ in recent years.
| A．had grown | B．grew |
| C．has grown | D．is growing |
There is an ongoing debate about the potentially harmful effects ________ text messaging can have on people's grammar.
| A．what | B．who |
| C．that | D．whose |
We invited her to dinner but she didn't bother to ________.
| A．turn on | B．turn away |
| C．turn up | D．turn out |