高中英语必修四unit2第四十九页第三题答案

1. We will focus on how to write a summary in this lesson.
2. We must skim the report and then find its main idea.
3. The teacher asked us to underline the difficult words and look them up in the dictionary.
4. He said it wasn't necessary to include such statistics as details .
5. I think I will use a report on how the farmers keep their soil free of chemical fertilizer.
6. The farmer spent 20 years building up his enterprise .
7. Using too much fertilizer will lead to serious problems.
仅供参考.