Read and write.用所给单词的适当形式填空。
1. Don’t eat that cake, Kitty. It’s not ______ (your).
2. I ______ (visit) my grandmother, because she ______ (be) sick.
3. What a mess! Let’s ______ (help) Mum clean the room!
4. Dan ______ (want) to go to Sanya this summer, but his mother ______ (not).
5. Our school is very beautiful. ______ (their) is beautiful too.
6. There are different ______ (book) in the bookshop.
7. Peter______ (go) to bed very late every night.