题目内容
— Is Jack on duty today?
— It ________ be him. It's his turn tomorrow.
| A．mustn't | B．won't | C．can't | D．needn't |
C
解析试题分析：考查情态动词表示推测：句意：--今天杰克值日吗？--不可能是他。明天该轮到他。Can’t be用于否定推测“不可能是”，must表示推测的时候，表示“肯定是”，won’t不愿意，needn’t不必，选C。
考点：考查情态动词表示推测
–I have packed your luggage for you need to rise early tomorrow.
--Thanks. You ______ that. I am a big girl now and I can manage it, Mum.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |
You really need to have a good rest．Remember：nothing ________make up for the loss of your health．
| A．must | B．need | C．can | D．dare |
As it turned out to be a problem of no importance , we so much time looking into it .
| A．needn’t spend | B．didn’t have to spend |
| C．needn’t have spent | D．oughtn’t to spend |
—Mother, I climbed up to that tall tree and picked this big apple.
—Jesus! You______ down and hurt yourself.
| A．might have fallen | B．might fall | C．must have fallen | D．must fall |
Mr. Smith is always on time for everything. How ________ it be that he was late for the flight?
| A．can | B．must | C．may | D．need |
—“Crash diets” make us lose weight fast and I am all into that.
—But it_______better to work out.
| A．had | B．would be | C．wouldn’t have been | D．must have been |
According to the agreement, nobody _______ let out how they spent the three days in the cave.
| A．must | B．may | C．will | D．shall |
You'd better take a heavy coat. Sometimes it ______ be very cold.
| A．should | B．can | C．will | D．must |