1. Chinese people invented the abacus in the sixth century. (改为被动语态)
    The abacus                                      in the sixth century by Chinese people.
2. I don't like the movie. The movie is very boring. (合并为含有定语从句的复合句)
    I don't like the movie                                      very boring.
3. I used to have long curly hair. (改为一般疑问句)
    __________ you __________ to have long curly hair?
4. Few people understood what he said at the meeting. (改为反义疑问句)
    Few people understood what he said at the meeting, __________ __________?
5. Mr. King is too busy to go to the concert. (改为同义句)
    Mr. King is ___________ busy ___________ he can't go to the concert.