1. There aren't two books and a pen on the desk.2. Our handwriting must be paid attention to.3. He didn't know anything about our plan.4. Let us do it right now,will you?5. She got up so late that she didn’t catch the train.6. Neither she nor her brother knows English .7. It is known that light travels much faster than sound.8. I like our English teacher who speaks English well.9. She didn’t go to class because she was ill.10. If you try it again , you will know how to do it. 11. In Chengdu, I often hear English spoken.12. Read the text from beginning to end, will you?13. Because of her illness she has to stay at home.14. Go to bring a chair for me. 15. The girl who speaks English well is from the northeast of China.