30. What a strange man! He loves his wife, but ______ he often beats her.

　 A. at a time　　　　　 B. at one time　　　　　　　　　 C. at times　　　　　　　　　 D. at the same time

31 ---- Where is mother?

　 ---- She is in the kitchen. She　 ______ the house work all morning.

　 A. is doing　　　　　　 B. was doing　　　　　　　 C. has done　　　　　　　　 D. has been doing

29. _____ will hurt the students’ eyesight.

　 A. Doing plenty of exercises　　　　　 B. Doing plenty of exercise.

　 C. Doing a lot of exercise　　　　　　 D. Doing a number of exercise

28.I can think of many cases _________ students obviously knew a lot of English words and

　 expressions but couldn’t write a good essay.

　 A. why　　　　　 B. which　　　　　 C. as　　　　　　 D. where　　

27. The _____ doctors in the country were attending the medical meeting to find out the real ____ of H1N1.

　 A. experience; cause　　 B. experienced; reason　　 C. top ; cause　　 D. top; reason

26.The doctor thought the medicine was perfect, but it didn’t ____ the disease at all.

　 A. work out　 　　　 B. solve　　　　　　 C. do　 　　　　　D. have an effect on

25.That is the way you thought of _________ weight.

A. losing　　 　　B. to lose　　　　　 C. lost　　　　　 D. lose

24.When their parents were out on vacation, the house was left _______ Dick.

A. in charge of　　 B. in the charge of　　 C. taking charge of　　 D. taking the charge of

23.Look out! Don’t get too close to the house 　　　　roof is under repair.

　 　A. whose 　　　　　B. which　　　　　 C. of which　　　 D. that

22.This morning she got up earlier 　　　　.

　 A. than usual 　　B. than usually　 C. as usual　　　 D. as usually

21.When left 　　　　college, he got a job as 　　　　reporter in a newspaper office.

A. /...a 　　　　　B. /...the　　　　 C. a...the　　　　 D. the...the