We ______ water the trees outside. Look, it is raining now. ( must, needn’t)
举一反三
- “Must we start the experiment now?” “No, you________.” A: won’t B: needn’t C: can’t D: may not
- I didn’t catch what you meant just now. It was too noisy outside. (for) A: I didn’t catch what you meant just now for it was too noisy outside. B: It was too noisy outside, forI didn’t catch what you meant just now.
- - It’s 10 o’clock now. I must go.- It’s raining outside. Don’t leave ( ) it stops. A: when B: since C: while D: until
- It is raining heavily now. If it _________________ (not rain) we wouldn't be staying indoors.
- ——May I go now？----No, you ____ . You ____ stay here. A: needn't； has to B: mustn't； have to C: can't； must D: needn't； must