39. You should understand the math problem now, you have had it ________three times.

A. explaining　 　　 B. to explain　　　 　　　 C. explained　　 　 D. explain

38. You forgot to send the business e-mail to manager.

Oh, my God, ___________.

A. So did I　　　　　　　　　　 B. I didn’t do so　　　　　　 C. I did so　　　　　　 D. So I did

37. He didn’t tell us __________________________.

Why? You don’t know the school bus will take us there.

A. where the school bus went　　　　 　 B. how will we get there　　　　

C. how we will get there　　　　　 　　 D. when to take the school bus

36. Hello, Lucy, Did you go to see the movie yesterday?

No, I didn’t. Because I __________ it before.

A. saw　　　　　　 B. have seen　 　　 C. had seen　　　 　　　 D. was seeing

35. It’s great ________ a volunteer.

Yes, helping others also ________ ourselves happy

A. being, make　　 B. to be, makes　 C. become, makes　 　　　 D. becoming, to make

34. Tina learnt to ride a bike by herself, but her twin sister _____by their father.

A. were taught　 　　 B. taught　　　 　 C. is taught　　 　　　　　 D. was taught

33. When I met my friend at the train station, he ______, So we only had time for a few words.

A. just left　　 　　　 B. has just left　 　　 C. had just left　 　　　　 D. was just leaving　

32. Three days later, he ____ a new plan to open up a new lab.

A. caught up with　　　 　　　　　　　　　　 B. ended up with

C. came up with　　　　 　　　　　　　　　　 D. followed up with

31. The radio says it will be very rainy tomorrow. We have to ____ the football match till next week.

A. put off　　　 　 B. put down　　 　 C. put on　 　　　　　 D. put away

30. He wants to sell his old house, so he put an ____ in a newspaper yesterday.

A. e-mail　　　　 　 B. article　　　 　 C. advise　　　 　　 D. advertisement