Read and fill in the blanks. 请你根据首字母和汉语提示写单词，将下列句子补充完整。
1. I want to send this l____ (信) to my mother.
2. How many p___ (明信片) are there?
3. This is an e____ (电子邮件).
4. Can you point to the t ____ (顶部) of the picture?
5. How much is the s____ (邮票)?
6. You can play on the c____ (电脑).
7. You can put a card in an e____ (信封).
8. Go straight and turn r____ (右).
9. Excuse me, where is the p____ o____ (邮局)?
10. Now it's in the top, left c____ (角落).
