Ⅰ. 单句改错
1. It has been five years after they married. (after改为since)
2. It will be half a month before we will graduate. (去掉第二个will)
3. Hardly had the words been spoken than he realized that he should have remained silent. (than改为when)
4. They were walking in the street while they heard footsteps behind. (while改为when)
5. The boy made loud noise in the classroom and his teacher told him not to make. (去掉make)
6. The instantly I saw him, I recognized him, though we had not seen each other for years. (instantly改为instant)
7. By the time he comes here tomorrow, I have finished the work. (在I后加上will)
8. There are some health problems that, when not treating in time, can become bigger ones later on. (treating改为treated)
9. With time went on, they forgot their original target to realize their dream. (With改为As)
10. The book gave me a deep impression for the first time I read it. (去掉for)