按要求改写句子。
1. Tim usually cooks dinner on Sundays. (用now替换on Sundays)
Tim________ _________dinner now.
2. The children are helping the old woman .(改成一般疑问句)
_____________________________________________?
3. She is closing the door now.(改成否定句)
__________________________________.
4. They are reading in the library . (对划线部分提问)
_______ ________ they ___________?
5. dog, is , jumping, bed, the, on, the (.)(连词成句)
_____________________________________________?