28．（8分）Today there are many fires than in the past．Over 100，000wildfires burn each year in America．Russia has 20，000to 35，000wildfires every year．Australia has on average 60，000each year．These fires destroy（损害）huge areas of forests and burn hundreds of homes．
Many experts believe there are several reasons for this sudden increase in fires．The first reason is climate（气候）change．Recent weather has been warmer and drier．This leads to dangerous fire conditions．When lightening strikes（发生雷电），dry grass easily catches fire．Hot winds add to the problem．The wind spreads a fire quickly．In 2010，Russia had the hottest and driest summer in a century．In just one month，500fires destroyed over 2，000homes．Some people lost their lives．
Traditional fire﹣fighting practices are another reason for the increase in fires．In America，firefighters used to quickly put out every fire．They didn't allow the grass and trees to burn．As a result，today many forests have thicker vegetation（植被）．Thicker vegetation means more fuel（燃料）for fires．Also，without fires from time to time，forests become overcrowded and unhealthy．Some trees are dead．The dead wood then easily catches fire．So surprisingly，America has many more fires today partly because of its past fire﹣fighting practices．
Scientists now understand that a fire can be a natural part of a healthy forest．As a result，countries like Australia allow more fires to burn naturally．Sometimes，fire fighters even start fires to get rid of（去除）dead wood．Of course，they carefully control the fires．The fire thins out old trees．This allows sunlight to reach the ground．As a result，fires help new trees to grow．Therefore，if a fire is not a serious threat（威胁）to people，firefighters may let it burn naturally．
68．Why did Russia have so many fires in one month in 2010？
A．Because lightening spread the fire．
B．Because there was much fuel for fires．
C．Because there were not enough firefighters．
D．Because it was unusually hot，dry and windy．
69．What happens because of the traditional fire﹣fighting practices in the USA？
A．There are fewer wildfires．
B．Trees and grass become thicker．
C．The weather becomes warmer and drier．
D．Sunlight reaches the ground to help forests．
70．What is the main idea of Paragraph 4？
A．Fires are serious threats to human beings．
B．Australian firefighters don't put out fires．
C．Fires can play an important role I forests．
D．It's difficult for firefighters to control the fires．
71．Which of the following is true according to the passage？
A．Not all the fires in the forests must be put out．
B．People's carelessness leads to dangerous fires．
C．Australia allows all the fires to burn naturally．
D．There are more fires in Russia than in the USA．
29．（8分）The first part of a new science﹣fiction series （系列剧）was shown on NBC last night．Star Trek is about a spacecraft（宇宙飞船）which travels faster than the speed of light．The show is developed from three ideas about the 22nd century．First，we'll find other life forms great tools which will make amazing things possible．
Let's think about these predictions．If we find life forms on other planets，will they be intelligent？I hope so．But we human beings might not be friendly﹣I don't think we'll believe in the idea o fpeace one hundred years from now．But this is science fiction，so we can be optimistic !And Star Trek's idea of life in the future is‘communicators'．And we will be ablt to have conversatins with people who are on because you'll have an electronic notebook．And if you get ill，the doctor won't have to examine you﹣a machine will‘read'your body．The strangest manchine includes a‘teleport'which will take people to a different placein a second!
The ideas are interesting，and in my opinion there's only one problem with star trek：the acting．The TV company （公司）will have to get better actors．If they do that，the show might be a success．If the acting doesn't improve，Star Trek won't last for more than one series．Of course，my prediction may be wrong．I can't see into the future!
72．What is Star Trek？
A．A TV play． B．A popular song． C．A spacecraft． D．An alien．
73．What does the underlined word" optimistic "mean？
A．Lucky and happy．
B．Hopeful and confident．
C．Helpful and creative．
D．Thankful and popular．
74．What's the writer's opinion about Star Trek？
A．The life forms on other planets are stupid．
B．Interesting ideas make a new series popular．
C．The new series might not be successful without better actors．
75．Which would be the best title for the passage？
A．Aliens on Other Planets．
B．The Idea of Human Life．
C．A Science Fiction．
D．A New Series about Future．
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