31．It is absolutely unacceptable to sacrifice people's life and health _______the economic development in any case．

　　　 A．in hope of　 　　　　 B．in exchange for 　 C．in face of　 　　　　 D．in need of

30．-What did your parents think about your decision?

　　　 -They always let me do ______I think I should．

　　　 A．when 　　　　　　　　 B．that 　　　　　　　　　 C．how 　　　　　　　　　 D．what

29．-If the traffic hadn't been so heavy, I could have been back by 6 o'clock．

　　　 -What a pity! Tina ______here to see you．

　　　 A．was coming　　　　 B．came　　　　　　　　　 C．would come 　　　 D．has come

28．Mrs．Obama once said, "People have different ______; they won't always like what you wear．"

　　　 A．tastes　　　　　　　　　 B．feelings　 　　　　　　 C．ideas 　　　　　　　　 D．senses

27．-_____up late never did any good to my quizzes．

　　　 -So, you've tried at least．

　　　 A．Stay 　　　　　　　　　 B．Stayed　 　　　　　　 C．Staying 　　　　　　　 D．Being stayed

26．China's population is expected to increase to be about 1．5 billion in 2040,______it will start to decline slowly．

　　　 A．since when 　　　　 B．before that　 　　　 C．on which 　　　　　 D．after which

25．The failure to find a satisfactory job after graduation pushed Liu Qian to ______magic as a career．

　　　 A．make up　　　　　　　 B．put up　　　　　　　　 C．set up 　　　　　　　　 D．take up

24．-Excuse me, is this seat vacant?

　　　 -Yes, it's________.

　　　 A．convenient　 　　　 B．available　 　　　　　 C．possible　　　　　　　 D．optional

23．-I haven't finished my homework yet．

　　　 -Speed up! We'll ______you another twenty minutes．

　　　 A．allow　 　　　　　　　 B．spare 　　　　　　　　 C．leave 　　　　　　　　 D．add

22．________ the Internet is of great help, I don't think it is a good idea to spend too much time on it．

　　　 A．If　 　　　　　　　　　　 B．While　　　　　　　　　 C．Because 　　　　　　 D．As