有题不会，求助！！

1、My parents are at work.2、Who's on duty today?3、What about playing games with us ?4、Please give it to him.5、What's the number between twelve and fourteen?6、I think it's time for you to go to school now.

1.at
2.on
3.about
4.to
5.of
6.for,to

1.at 2. on 3. about 4. to 5. of 6. for to