老师看看·····21.This toy car must be your broth-er's(改为否定句)This

老师看看·····
21.This toy car must be your broth-er's(改为否定句)
This toy car _____ _____your brother's.
22.The volleyball may be Tony's(改为同义句)
___________the volleyball_________Tony's
23.Sam doesn't play computer games any more.(改为同义句)
Sam ______ ______ plays computer games.
24.What does this word mean?(改为同义句)
What' _______ ______________ this word?
25.The children are having fun in the park.(改为同义句)
The children are _____________ in the park.
麻烦老师解答下.