21．Miss Li ________ as a biology teacher for fifteen years in our school, and now she is Party secretary of our city.
A. works B. worked C. had worked D. has worked
21．The 82nd Oscars Academy Awards, ________ the best in film for 2009, was held on Sunday, March 7, 2010.
A. to honor B. honoring C. honored D. having honored
21．—I thought Stephanie and Lee were getting married in June.
—No, that’s ________ her cousin’s wedding is.
A. where B. when C. why D. how
21．Since its entry into ________ Chinese market, Google has been enjoying ________ legal market access and national treatment.
A. the; a B. 不填; 不填 C. a; the D. the; 不填
21．China’s housing price becomes one of the hottest topics during the Two Sessions, ________ most ordinary Chinese people find it more and more difficult to buy a flat in cities.
A. where B. so C. as D. though
21．—May I see your ticket, please? I think you ________ in my seat.
—Oh, you’re right. My seat is upstairs. I’m terribly sorry.
A. are sitting B. sit C. sat D. have sat
