21. When asked about his happiness, Baoqiang said that if he could afford _________ house, he would feel he was really _________ success.
A. /, a B. /, the C. a, a D. a, /
22. Since the film “Life of Pi” was on, it _________ more and more people around the world.
A. attracted B. had attracted C. has attracted D. will have attracted
23. _________ in the mountain for more than 2 days, the climbers looked pale and weak.
A. To be trapped B. Having trapped C. Trapping D. Trapped
