【正文】
t ________________ (clean) the classroom now. 4. You should ________________ (be) quiet in the library. 5. Please tell me how ________________ (cook) an egg. 6. There are many beautiful ________________ (city) in our country. 7. Are you ________________ (play) the piano tomorrow? 8. Her brother often ________________ (finish) his homework before dinner. 9. The football game is ________________(excite). 10. Sam is ________________ (excite) about the travel plan.