按照要求进行句型转换。
1. How many units must we learn this term? (改为被动语态)
How many units this term?
2. It took him two hours to finish reading the novel.(改为同义句)
He two hours the novel.
3. Parents should allow their children to choose their own clothes.(改为被动语态)
Children to choose their own clothes.
4. I was asked to clean up the room by my teacher.(改为主动语态)
My teacher to clean up the room.
5. I believe that Lucy is allowed to perform a play for the old people.(改为否定句)
I believe that Lucy to perform a play for the old people.
