His father, a famous university professor, who is said to have started his teaching career in Australia, _____ in Nanjing University for more than twenty years.
| A．has worked | B．worked | C．is working | D．will work |
--Has Peter handed in his paper yet?
---I’m not sure. He _______ on it last week.
| A．was working | B．has worked | C．worked | D．had worked |
The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.
| A．can’t | B．shan’t | C．needn’t | D．mustn’t |
--Have you called Mr Johnson’s office?
---Yes. He ____back before tomorrow noon. So he can attend our meeting on time.
| A．expected | B．is expected | C．is expecting | D．is to expect |
Word comes _____ free books will be given to ______come first in this book fair.
| A．which,no matter who | B．that, anyone who | C．which,whoever | D．that,those who |
The fire _______ before the fire-fighters arrived.
| A．has been put out | B．was put out | C．had put out | D．had been put out |