33．This creates a threat to agriculture and the food chain，and 　　　to human health．

　 A．so that B．consequently　　 　　 C．as if D．fortunately

32．To stay fit，Jack spares one hour every day to　　　 with the weights twice a week．

　 A．run out　 　　 B．work out　　 　 C．try out 　　 D．watch out

31．　　　 too much attention on that problem，Tom suddenly realized that he had little time left　　 for the rest．

　 A．To focus　　 　　　　　　　　　　 B．Have focused

　 C．Having focused 　　　　　　　　 D．To have focused

30．一Why didn’t you respond to their greeting?

　 -Sorry．I 　　　they　　　 to me．

　 A．don't realize；are waving　　 　　 B．don’t realize；were waving

　 C．didn’t realize；were waving 　　 D．didn’t realize；are waving

29．　　　 　with other countries，China has little natural resources, because China's population is　　 the biggest in the world．

　 A．To compare　　 　 B．Comparing 　　 C．Compared 　　　 D．Compare

28．一A terrible day yesterday!

　　 一Yeah! But we went to see the exhibition 　　　　　the storm．

　 A．but for　　 　 B．in spite　　 　　　 C．despite of 　　　 D．despite

27．Because of his serious illness the manager had to 　　from his position．

　 A．resign　　 　 B．design　 　 C．sign D．1eave

26．It is because English is being widely used at present 　　　．

　 A．why we are learning it hard　　 B．that we are learning it hard

　 C．which we must learn it hard 　　 D．when we should learn it hard

25．The professor advised us to think outside the box and to　　　 new，different, or unusual solutions．

　 A．put up with　 　　　　　　　　　　 B．come up with　

C．keep up with 　　　　　　　　　　 D．catch up with

24．一How are you getting on with the project of wildlife protection?

　　 一All gets on well as 　　　　．

　 A．to be planned　　 　　　 B．being planed　 C．planned 　　 D．planning