英汉互译。 1. my name ______________ 3. 对不起 ______________ 5. at school ______________ 7. my mouth ______________ 9. in the classroom ______________ 2. 20支钢笔 ______________ 4. How are you? ______________ 6. 在家 ______________ 8. in the book ______________ 10. 我的朋友 ______________