31. The water was so dirty that we couldn’t drink it.(改为简单句)

The water was _________ dirty for us _________ drink.

30. She isn’t going to wash anything on Sunday.(改为肯定句)

She _________ going to wash _________ on Sunday.

29. I think you are right.(改为否定句)

I _________ think you _________ right.

28. Meimei has to look after her little brother at weekends. (改为否定句)

Meimei _________ _________ to look after her little brother at weekends.

27. Mary does her homework on Sundays. ( 改为否定句)

Mary _________ _________ her homework on Sundays.

26. All of us want him to rest.(改为完全否定句)

_________ of us _________ him to rest.

25. The children weren’t playing on the playground.(改为肯定句)

The children _________ _________ on the playground.

24. You’d better take it to your office.(改为否定句)

You’d better _________ _________ it to your office.

23. Don’t let him go boating today!(改为肯定句)

_________ _________ go boating today.

22. Both of his parents were pleased with the result.(改为完全否定句)

_________ _________ _________ _________ _________ pleased with the result.