Exercise 3: choose the best answer for the following questions. 1. This is the first time I ............... Thailand. Dễ luôn.         A.visit                       B. visited                     C. am visiting                 D. have visited 2. We have waited for Jill ............... 8 o’clock.              A.since                      B. for                              C. ago                              D. during 3. We stayed indoors in spite of ...............            A. the bad weather           B. the weather was bad     C. the good weather       D. the weather was good 4. You ……………… a lot since the last time I saw you. A. changed             B. has changed     C. is changing             D. have changed 5. He………. more concerned about his social status since he started working there. A. has been becoming        B. has become     C. became             D. will become 6. I ……………. the report yet. Cô thấy e giỏi chưa. A. hasn’t completed                     B. completed        c. have already completed                 D. have not completed 7. We ………………. three power cuts this week. A. has had         B. have had             C. had                   D. is having 8. The team ……………. numerous setbacks so far. A. experienced     B. have experience         C. has experienced           D. is experiencing 9. John ……………. for three tests this month. A. sat             B. have sat             C. has sat               D. is sitting 10. He's the most difficult housemate _____________________ A. I never dealt with.                    B. I never had to deal with. C. I've ever had to deal with.                D. I've never had to deal with Giúp mik vs