（全国I卷）27. —Have you known Dr. Jackson for a long time?
—Yes, since she ______ the Chinese Society.
A. has joined B. joins C. had joined D. joined
（全国I卷）29. The wet weather will continue tomorrow, when a cold front ______ to arrive.
A. is expected B. is expecting C. expects D. will be expected
（安徽卷）22. -----Did you watch the basketball match yesterday?
-----Yes, I did. You know, my brother ________ in the match.
A. is playing B. was playing C. has played D. had played
