数的运算中含有一些有趣的对称形式，如12×231=132×21，按照此等式的形式填空：12×462=______×______；______×891=______×81．

根据句意及首字母，填入适当的单词。

1. She often b______ her sister on Sundays.

2. What's she doing for v______?

3. I'm going c______ with my parents.

4. They're r______ at home this weekend.

5. Tom is playing football n______ week.

6. I'm very t______. I want to have a rest.

7. P______ is the capital (首都) of France.

8. We're taking a v______ to Hawaii this summer.

9. My uncle lives in the c______. He has a big farm there.

10. F______, they decide to ask the policeman for help.