One of our rules is that every student ________ wear the school uniform while at school.
A．might B．could
C．shall D．will
—Why does Thomas speak through every discussion but never listen to the others?
—That's what he ________ do. We used to hate that, but are used to it now.
A．ought to B．can
C．will D．might
________ the arrival of the police, I would have been robbed by two masked men.
A．Had it not been for B．If it were not for
C．Had it been not for D．If it would not be for
I know that it will be difficult to pick him out in such a crowd, but if you ________ happen to see him, give him this packet.
A.wouldB．might
C．shouldD．could
She didn't come to the party last Sunday. ________， she must have made the party more exciting.
A．If she came B．Would she come
C．Had she come D．Did she come
Students ________ remain in their seats until all the papers have been collected.
A．wouldB．shall
C．will D．could
