题目内容
—There's someone knocking on the door．Who it be?
—It must be Mary．She promised to be here at 8：00．
| A．must | B．can | C．shall | D．need |
B
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B
考点: 考查情态动词的用法。
七星图书口算速算天天练系列答案
初中学业考试导与练系列答案Do some warming up exercise before sports. Or you _______ hurt yourself.
| A．must | B．need | C．should | D．may |
— It’s no easy task to catch a ticket on a website that receives 1 billion clicks daily.
—I can’t agree with you more. There ________ be errors for every single step.
| A．should | B．must | C．will | D．can |
---who______it be that is knocking at the door?
---It_______be Father, but I’m not sure.
| A．can, must | B．can, may | C．must, can | D．may, must |
You'd better not ride the bicycle on snowy days; you ______ fall．
| A．must | B．might |
| C．have to | D．ought to |
She was greatly shocked at the scene before her eyes. Never did she expect that the local conditions ______ be so awful.
| A．could | B．should | C．would | D．might |
“No student,” the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission.”
| A．must | B．will | C．shall | D．may |
I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house. (2012·新课标全国，30)
| A．couldn’t | B．mustn’t |
| C．shouldn’t | D．needn’t |
I felt surprised that anyone of his intelligence ________ such an easy test.
| A．might have failed | B．could have failed |
| C．should have failed | D．must have failed |