若点A（1-2a，a-2）关于原点的对称点在第一象限，则a的整数解有（　　）

A．1个

B．2个

C．3个

D．4个

用所给词的适当形式填空。

1. I don't have much time              (play) with my friend.

2. Thank you very much for              (write) to me.

3. Every day Millie spends half an hour              (study) English.

4. Lily always helps her mother              (clean) the house.

5. Daniel              (not want) a new computer.