1.所有的学生都在忙于准备数学测验。

　All the students are_________ _________ _________ for the_________test.

15. If Mg_________in O2, we_________ MgO, and it _________ a combination reaction (化学变化).

　A. will burn; get; calls

　B. burns; will get; called

　C. will burn; can get; is called

　D. burns; will get; is called

14. _________is bad for our health.

　A. Doing eye exercises B. Going to bed early

　C. Eating too much D. Taking a walk after supper

13. Reading English aloud_________very important for students.

　A. were B. being C. is D. are

12. The world's population is growing fast every minute, especially in some_________ countries.

　A. west B. east C. more developed D. less developed

11. In Australia, Christmas Day is in_________.

　A. spring B. summer C. autumn D. winter

10. A lot of milk_________bad.

　A. has been to B. have been

　C. has gone D. has gone to

9. Maths_________difficult to learn.

　A. is B. are C. does D. do

8. The boy's teacher and friend _________a young doctor.

　A. is　B. are C. want to be D. being

7. Everything around us_________OK.

　A. are B. have been

　C. is D. has been