must
- Must I clean the classroom now, Miss Wang?–No, you needn’t . It by Bill.
- I think trees ____________ twice a week in such hot weather.—Yes, I agree. Or they may die without water.
- We must stop the hunters hunting the Tibetan antelopes(藏羚羊) in Tibet.— I agree with you. If it ________, they will ________ soon.
- It’s said a pianist will perform at Poly Theater on Friday evening. Is it Lang Lang? — Yes, it _______ him. He _______ for a week.
- Look at these factories. I hate them. They____ many rivers here. –Yes. Something ______ to stop the pollution.
- You must set off at once, ______you would be late for school.
- It’s your decision — you must ____ the responsibility if things go wrong.
- The old tower must be saved, _______ the cost.
- Letters to the editor must carry the writer’s full name, which indicates that writers are _____for what they say.
- Her handbag is on her desk. She ____ back home.