1. He was writing to his friend when he __________a noise.

      A. was hearing            B. heard                                C. had heard                   D. hears

2. I __________many people since I came here in June.

      A. met                         B. has met                            C. was meeting              D. have met

3. We __________ maths at this time last week.

      A. were learning         B. are learning                C. was learning                   D. learnt

4. She was playing games while he __________a football match.

      A. watched                  B. watches              C. was watching                          D. watching

5. She __________to Ho Chi Minh city last year.

       A. goes                       B. has gone            C. go                                              D. went 

6. Since we came here, we ______ a lot of acquaintances.

A. have had                 B. had                                 C. have                     D. are having