题目内容
— There'ssomeone knocking on the door. Who _____it be?
— It must be Mary. She promised to be here at 8：00.
| A．must | B．need | C．shall | D．Can |
D
解析试题分析：句意：--有人在敲门。可能会是谁呢？--一定是Mary。她答应八点钟到这里。A. must一定，表主观肯定推测；B. need需要；C. shall将会是；D. can可能，表示怀疑、猜测、惊异（主要用于否定句或疑问句中）。故选D。
考点: 考查情态动词的用法。
--- You needn’t take an umbrella. It isn’t going to rain.
--- Well, I don’t know. It ______do.
| A．might | B．need | C．would | D．should |
Doctor Wang at seven o’clock for the conference, but she didn’t turn up.
| A．should have arrived | B．should arrive |
| C．should be arrived | D．should be arriving |
I don’t know what happened to my pet. It just ________ eat whatever I feed her.
| A．don’t | B．won’t | C．can’t | D．couldn’t |
According to the newly-made traffic regulation, whoever drives through red light be fined at least 200 dollars．
| A．shall | B．may | C．would | D．should |
Harry is feeling uncomfortable. He _____ too much at the party last night.
| A．could drink | B．should drink |
| C．would have drunk | D．must have drunk |
It was a fine day yesterday. I ________ have taken my raincoat with me.
| A．couldn’t | B．needn’t | C．shouldn’t | D．mustn’t |
－These peaches really juicy.
－They ____ be! Just see the price, $3,99 a pound. Very expensive, aren’t they!
| A．would | B．could | C．might | D．should |
It was so dark outside that the little child ________ go out by himself.
| A．dare not to | B．dared | C．dares | D．didn’t dare to |