Recently the Chinese society has ________ a flow of new words such as “Geili” and “ Shanhun”．
| A．seen | B．observed |
| C．made | D．looked |
It ________be the postman at the door.It's only six o'clock.
| A．mustn't | B．can't |
| C．won't | D．needn't |
It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
| A．may | B．couldn't |
| C．should | D．needn't |
—What are you doing this Saturday?
—I'm not sure, but I ________ go to the Rolling Stones concert.
| A．must | B．would |
| C．should | D．might |
I'm going to Europe on vacation together with John if I ________ find the money.
| A．can | B．might |
| C．would | D．need |
He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn't | B．shouldn't |
| C．couldn't | D．mustn't |