Don't forget to _____"Thank you" when someone has helped you. [ ]

A. speak

B. tell

C. talk

D. say

根据汉语完成句子。

1. He _________ in a small village. (出生)

2. The boy _________ for three hours. (打嗝)

3. How old _________ you when you began to go to school? (be)

4. Deng Yaping _________ Olympic Games in 1994. (参加)

5. Mark Twin was an _________ writer. (杰出的)