1. Miss Zheng teaches in a school. / Miss Zheng is a teacher of a school.
2. I / He / She went home by bus yesterday. / I / He / She took a bus home yesterday.
3. I like (playing) football best. / He likes (playing) football / soccer best.
4. They / We will travel to Beijing next month.
5. We should protect our earth.
( 答案不唯一)