— May I watch TV now, mum?
— No, you . You must clean your room first.
| A．may not | B．needn’t | C．can’t | D．mustn’t |
Not only oral English but also written English _____ important.
| A．is | B．are | C．was | D．were |
—We’ll make a trip to Hainan Island next weekend. Will you go with us?
—No, I can’t _____ it at present.
| A．afford | B．save | C．offer | D．accept |
—How many students are there in the classroom?
—_____ I don’t know where they have gone.
| A．No one. | B．None. | C．Nobody. | D．Nothing. |
The rubbish _____ is produced every day is becoming a serious problem in cities around the world.
| A．what | B．that | C．who | D．whose |
More and more trees were cut down. _____, many animals are dying out.
| A．In the end | B．So that | C．As a result | D．At last |