You didn ’ t let me drive. If we _____ in turn, you ______ so tired.

Maybe if I _______ literature, but not science then, I would be able to give you more advice now.

If it hadn’t rained so hard last night，it_______ so  cold today.

There       be any difficulty about passing the road test since you have practised a lot in the driving school.

Will was stupefied with exhaustion, and he _____ his head on the grass under one of the trees and slept, but he saw a cat acting strangely.