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　　（ ）27. It is essential that mankind ways and means to protect the environment.

　　A. adopt B. have adopted C. will adopt D. will have adopted

　　（ ）28. The information any more. I've got enough.

　　A. need not collect B. doesn't need be collected

　　C. need not to be collected D. doesn't need to be collected

　　（ ）29. -What do you think made Mary so upset？

　　- her new bicycle.

　　A. As she lost B. Lost C. Losing D. Because of losing

　　（ ）30. We all our achievements to the correct leadership of the Party.

　　A. own B. owe C. devote D. appreciate

　　III.Cloze

　　Who doesn't love sitting beside a fire on a cold winter night？ Fire is one of man's greatest friends ， but also one of （31） greatest enemies. Many big fires are caused by carelessness. A lighted cigarette thrown （32） a car or a train window， or a broken bottle lying on dry grass can （33） a fire. Sometimes a fire can start on its own. Wet hay can begin of itself. This is （34） it happens： The hay starts to rot and begins to （35） heat which is trapped inside it. Finally， it bursts into flames. That is why farmers cut and store their hay when it's dry.

　　Fires have destroyed （36） cities. In the 17th century， a small fire which （37） in a shop burst down nearly every building in London. Moscow was set fire to during the war against Napoleon. This fire （38） burning for seven days. Even today， in spite of modern fire-fighting （39） ， fire causes a great deal of damage each year both in our cities and in the countryside. It has been widely （40） that fire is a good servant but a very bad master.

　　（ ）31A.his B.its C.ourD.their

　　（ ）32.A.into B.out of C.fromD.over

　　（ ）33.A.happenB.light C.make.D.start.

　　（ ）34.A.whatB.why C.how.D.because.

　　（ ）35.A.give offB.get out C.break out.D.make out.

　　（ ）36.A.noB.many C.samllD.big

　　（ ）37.A.wasB.is C.startD.began

　　（ ）38.A.lastedB.continued C.stoppedD.began

　　（ ）39.A.methodsB.researches C.studiesD.engines