A computer ______ think for itself; it must be told what to do
can’t B
couldn’t C
may not D
might not2
She has to answer for what she has done,____
doesn’t she B
hasn’t she C
has she D
does she3
You ___to the meeting this afternoon if you have something important to do
needn’t B
needn’t to come C
needn’t come D
don’t need come4
what you have done
You ___be more careful
should C
would D
had to5
---Shall I tell John about it
---No,you ____
I’ve told him already
needn’t B
wouldn’t C
mustn’t D
shouldn’t6
She doesn’t answer the doorbell
She ___ be asleep
might B
ought to C
should D
must have 7
___he ___a famous doctor at that time
He was so young then
Can;be B
Must; be C
Can;have been D
Must;have been8
They ___ the plane,or perhaps they have been p
