问题详情：
根据句意及首字母提示，补全单词，使句子完整、正确。
1. —How many students are there in your class?
—F . Thirty boys and twenty girls.
2. —What colour is your new bike?
—O .
3. My best friend was born in 1994, so he is thirteen y old now.
4. Simon’s parents are very b and don’t have much time to talk with him.
5. My father b two books from the library twice a month.
【回答】
1. Fifty 2. Orange 3. years 4. busy 5. borrows
知识点：单词拼写
题型：完成句子
