1 . 单句改错
1. I think it is one of the best films that has ever been shown here this year.
2. The windows which faces south are all broken in the explosion.
3. Between the two buildings stand a monument.
4. Many a student have made the same mistakes not long before.
5. Two thirds of the land in this area are covered with trees and grass.
6. Most of what has been said about the Smiths are also true of the Johnsons.

2 . 单句改错
1. Either he or I plays football on Sundays.
2. A lot of work were done to prepare for the 2022 Winter Olympics.
3. One hundred yuan are enough to buy the novel The Three-Body Problem.
4. What caused the accidents remain unknown.
5. Doing experiments are a good way to find out answers to questions.
6. Tom as well as two of his classmates were invited to the party.

3 . 单句改错
1. This is the best way of which we can do the work well.
2. This modern hotel, from which the visitors can enjoy the best service in the city, is where Mary stayed last time.
3. In our class there are 46 students, half of them wear glasses.
4. Breaking up is the business of the two lovers, in where no other person should be involved.
5. Waste tends to be the pollution problem to which other problems are eventually reduced.
6. Scientists have advanced many theories about why human beings cry tears, none of that has been proved.
7. Nowadays many old people don’t like the way in that some children talk to their parents.
8. Copper is one of the metals in which we are most familiar.
9. What I’m going to say may offend some sensitive listeners at the meeting, to which I offer my apologies in advance.
10. I finally knew the reason for that she didn’t tell me the truth.