Question

单句改错（每个句子只有一处错误，每处错误只能改动一个词。）

1. Before the earthquake farmers noticed there were deep cracks on some of the well walls.
    ____________
2. Mice ran out of the fields looked for some places to hide.
    ____________
3. People could hear the sound of planes outside city of Tangshan even when there were no planes in the sky. 
    ____________
4. Two-third of the people in Tangshan died or were injured during the earthquake. 
    ____________
5. 75% of its factories, buildings and 90% of its homes was gone. 
    ____________
6. A number of people who were killed or injured reached more than 400,000. 
    ____________
7. Workers built shelters for survivors their homes had been destroyed. 
    ____________
8. Fresh water was taken to the city by the train, truck and plane. 
    ____________
9. In fifteen terrible minutes the big city laid in ruins. 
    ____________
10. The frightening boy whose mother was lost in the earthquake is looking for her now. 
    ____________

Answer 1

l. on→in 2. looked→looking 3. 在city前加 the 4. third→thirds 5. was→were
6. A→The 7. their→whose 8. 去掉第二个 the 9. laid→lay 10. frightening→frightened