41. By the end of next March, I _______ English for five years.

     A. had been studied                                            B. had been studying

     C. will have been studying                                 D. will have studied

42. Linda took great photos of butterflies while she _______ in the forest.

     A. was hiking                B. is hiking                    C. hiked                        D. had hiked

43. When I _______ for my sister in front of the supermarket, a strange man came to talk with me.

     A. was waiting              B. waited                       C. had waited                D. were waiting

44. When I came to visit her last night, she _______ a bath.

     A. is having                   B. was having               C. has had                     D. had had

45. John _______ in the same house since he left school.

     A. lived                         B. had lived                   C. was living                 D. has lived

46. He will take the dog out for a walk as soon as he _______ dinner.

     A. finish                        B. has finished              C. will finish                 D. finished

47. The phone _______ suddenly while Joanna was doing the housework.

     A. rang                          B. was ringing               C. had rung                   D. is ringing

48. A fire-fighter was injuried severely while he _______ to put out a fire.

     A. would help               B. helped                       C. has helped                D. was helping

49. By the time I came here all the better jobs _______ taken.

     A. have been                 B. were                         C. are                            D. had been

50. While Peter _______ the rose bush in the back yard, the phone rang.

     A. had been watering    B. watering                   C. watered                     D. was watering

Rewrite the sentences without changing the meaning

1 Studying English is very interesting

\(\rightarrow\)It

2 I last saw her three months ago

→I haven't

3 They have learnt English for 8 years

→They stated

4 They are going to build a new bridge in the area

​→A

5 Children can understand the problem

→The problem