【2015·重庆】Bach died in 1750, but it was not until the early 19th century____ his musical gift was fully recognized.
| A．while | B．though |
| C．that | D．after |
You _____ practise the drums while the baby is sleeping.
| A．needn’t | B．mightn’t | C．mustn’t | D．won’t |
The police still haven’t found her, but they’re doing all they _____.
| A．may | B．can | C．must | D．will |
The World Wide Web is sometimes jokingly called the World Wide Wait because it _________be very slow.
| A．should | B．must | C．will | D．can |
—The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
— Oh, dear! She _________ a lot of difficulties!
| A．may go through | B．might go through |
| C．ought to have gone through | D．must have gone through |
—Lucy doesn’t mind lending you her dictionary.
—She _________. I’ve already borrowed one.
| A．can’t | B．mustn’t | C．needn’t | D．shouldn’t |