模仿例句改写句子.
Example:He must be in the office.→He must have been in the office.
He can't stay there.→He can't have been staying there.
1.You must drive fast.__________________________
2.He can't be at home__________________________
3.My father must read in his room._________________________
4.Tom can't study hard.______________________
用适当的介词填空.
1.What's the problem about deciding______a holiday.
2.I usually go to work_____bus.
3.Who's going to look_____the garden.
4.He was driving_____60 miles an hour.
5.Susan is waiting_____Helen now.