If it ________ for the snow, we ________ the mountain yesterday．

were not; could have climbed

were not; could climb

had not been; could have climbed

had not been; could climb

Galileo insisted that the earth ________ round the sun．

should move

move

moves

is moving

The teacher required that no one ________ late for class．

be

must be

should have been

was

If we ________ everything ready by now, we should be having a terrible time tomorrow．

hadn’t got

didn’t get

wouldn’t have got

wouldn’t get

Should she come tomorrow, I ________ take her to the museum．

can

will

would

must

Don’t you think it is time you ________ smoking?

give up

gave up

would give up

should give up

Peter wishes that he ________ law instead of literature when he was in college．

could study

studied

had studied

would study

He talks as if he ________ everything in the world．

knows

knew

had known

would have know

I am too busy these days．I would rather all of you ________ next month for a dinner．

come

would come

came

have come

It’s desired that she ________ to teach us at least twice a week．

comes

will come

come

may come