31．Once again he failed to hand in his homework _____ he had been given enough time to do it．

　　　 A．in case　　 　　　 B．as though　 　　　 C．so that　　 　　　　 D．even though

30．They live on a busy road．There ______ be a lot of noise from the traffic．

　　　 A．must　　 　　　　　 B．may　　　 　　　　 C．would　　 　　　　 D．could

29．_____ the chapter four times, I finally understood the author's theory．

　　　 A．Reading　　 　　　　 B．Having read　 　　　 C．To read　 　　　　　 D．Read

28．Ann ______ here any more．She left last month．

　　　 A．won't work　 　　　 B．doesn't work 　　　 C．hasn't worked　　　 D．isn't working

27．The conference aims to develop business and let people think about ______ they can have a

　　　 positive influence on the planet．

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

26．-Can I ask you a few straightforward questions about yourself？

　　 -No problem．I like ______ when people are open and direct．

　　 A．that　　　 　　　 B．this　　　　　 　　 C．it　　　　 　　　　　 D．them

25．They went on well at first but eventually everything ______ they had worried about happened．

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

24．You really need to go out and get some fresh air and sunshine．You ______ overworked

　　 during the last two weeks．

　　 A．have been　　 　 B．were　　 　　　　　 C．had been　 　　　　 D．would be

23．-Hi, David, I heard you had an accident this morning．

　　　 -Yes．Luckily, I hit the brakes in time ______ I would be injured badly．

　　 A．and　　　 　　　 B．but　　　 　　　　　 C．or　　　　 　　　　 D．so

22．Mike seldom asks ______ questions in class, but today he raised ______ fairly good one．

　　 A．/; a　　　 　　　　 B．the; a　　　 　　　　 C．/; the　　 　　　　　　 D．/; /