—Beautiful day, isn't it? Let's go out for a picnic.
— __________.
| A．Sounds great | B．That's all right |
| C．Good luck | D．Have fun |
-What sort of house do you want to have? Something big?
--Well, it ______ be big--that's not important.
| A．mustn't | B．needn't | C．can't | D．won't |
Although this ____ sound like a simple task, great care is needed.
| A．must | B．may | C．shall | D．should |
—She looks very happy. She ______ have passed the exam.
—I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |
Thank you for all your hard work last week. I don’t think we ______ it without you.
| A．can manage | B．could have managed |
| C．could manage | D．can have managed |
John, look at the time. ___________ you play the piano at such a late hour?
| A．Must | B．Can | C．May | D．Need |