1. 根据句意及首字母提示完成单词

1. （1） My father u to be a worker, but he is an engineer now.

3. （2） My teacher told us plenty of h stories.

5. （3） Do you know when to keep s?

7. （4） The b of the English and the Chinese languages are widely different.

9. （5） Now I am used to t English here.

11. （6） Many students are afraid of t exams.