1. I'm not sure what I can buy for my brother. ( 改为同义句)
    I'm not sure_____ _____  _____ for my brother.
2. The young man is so a strong that he can carry the heavy box.  (改为同义句)
    The young man is strong _____  _____ carry the heavy box.
3. I really don't know what I should write to him.  (改为同义句)
    I really don't know_____  _____ _____ to him.
4. What's wrong with it? (改为同义句)
    _____  _____ _____ with it?
5. We should help him to write letters. (改为否定句)
    We _____ _____ him to write letters.

1. The old man is so old that he can't work.
    The old man is too old                         .
2. I don't know how I can get to the TV factory.
    I don't know                                         to the TV factory.
3. Mr. Green went back to England for a holiday.
    Mr. Green went back to England                           a holiday.
4. Mike hopes he can visit the Great Wall on day.
    Mike hopes                          the Great Wall one day.
5. Does he say anything for himself at the meeting?
    Does he have anything                          for himself at the meeting?
6. He is so strong that he can carry the heavy box.
    He is strong                                       the heavy box.
7. He spent two hours doing the work.
    It             him two hours                          the work.
8. It's time for school.
    It's time                                       school.
9. It seems that she is an English teacher.
    She                                       an English teacher.
10. His father said to him, "listen to the teacher carefully."
      His father told him                                       the teacher carefully.