Chia động từ trong ngoặc với dạng đúng, hoàn thành câu

1. I (receive)                  a letter just a few minutes ago.

2. They (live)                  in London since 1980.

3. Linda is working in this department. She (work)                  here for two years.

4. Up to present, John (do)                  good work in the class.

5. (they/ put)                  their book on my desk last night?

6. He (study)                  English at this school for six weeks up to now.

7. Nobody lives in those houses. They (be)                  empty for many years.

8. Cindy is in her office. She (be)                  there since 7 o’clock.

9. My sister (come)                  to see me last night.

10. My friend George is learning Japanese. He (learn)                  it for six months.