41. I ……………………… for her for over 30 minutes, but she ……………… yet. (wait / arrive) 42. Would you mind ……………………. quiet in a moment ? (keep) 43. Do you think English is quite easy ……………………… ? (learn) 44. The headmaster ……………………… the result of the contest next week. (announce) 45. Hurry up or the train ………………… before you catch it. (leave) 46. By the time the police arrived, the robbers …………………… away. (run) 47. They ……………… in Scotland for ten years. But now she lives in Liverpool. (live) 48. This coast must ……………………… in England ten years ago. Look at the label. (make) 49. Some trees ………………………… on the pavement at the moment. (plant) 50. This is the student who ……………………… by the teacher this morning. (praise) C. 1. At this time, they ………………… hide and seek on the school yard. (play) 2. Carol ……………. a visit to Hanoi last week. (pay) 3. English as well as Math and Literature ……………. very difficult for us to study. (be) 4. I went climbing with him after he ………………… his homework. (finish) 5. Up to now, we …………………. many books about Ngo Bao Chau’s works. (read) 6. We ……………………. this place again someday. (visit) 7. The number of the unemployed ……………………… every day. (increase) 8. She …………………… to the radio cassettes then. (listen) 9. He ………………. and he feels exhausted now. (swim) 10. Yesterday the police reported that they ………………… the thief. (capture)