Bài 1: Trong các biểu thức đại số sau, biểu thức nào không phải đơn thức? A. 2 B. 5x + 9 C. x^2 y^2 D. 3x

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Choose the correct answer. 1. It ________ much in summer. It ________ now. a. rain/ is raining b. rains/ are raining c. rains/ is raining d. is raining/ is raining 2. Daisy ________ some food in the kitchen at present. She always ________ in the morning. a. cook/ is cooking b. cooks/ are cooking c. cooks/ is cooking d. is cooking/cooks 3. I ________ for two hours, but she has not come yet. a. have waited b. has waited c. has been waiting d. waited. 4. ________ you ________ so far? I have rung the bell for the last twenty minutes. a. has …. slept b. have … been sleeping c. have sleep d. has … been sleeping 5. Mary has lost her hat and she ________ for it until now. a. have been looking b. has look c. has been looking d. have looked. 6. Listen! I think someone ________ at the door. a. are knocking b. has knocked c. is knocking d. have knocked. 7. Do you know that man who often ________ here? a. smokes b. smoke c. has smoked d. have smoked. 8. We are from French. We ________ there for 20 years. a. has been b. are c. have been d. are being 9. The Statue of Liberty is a major monument in New York which ________ freedom. a. attracts b. symbolises c. decides d. understands 10. Mai ________ her dictionary lately. a. lose b. loses c. have lost d. has lost. 11. I ________ for the manager for two hours. a. am waiting b. wait c. has waited d. have waited 12. The flight number 781 to Melbourne ________ at 9 o’clock tomorrow morning. a. arrives b. is arriving c. has arrived d. will arrive 13. We ________ on the Great Ocean Road, an Australian National Heritage at the moment. a. will drive b. drive c. have driven d. are driving 14. Some documents say that people ________ that Festival since the beginning of the 19th century. a. celebrated b. were celebrating c. have celebrated d. celebrated