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| Many scientists say that the world is getting hotter and hotter. If they are right, the ice at the North and South Pole will melt eventually. If this happens, the sea will 1 and may cover most 2 all of Singapore. This will force everybody to move to a 3 country. We know that the sun 4 the earth. The heat from the sun hits the 5 , and some of 6 goes back into the sky. However, factories and cars 7 a lot of carbon dioxide (二氧化碳). When the gas rises into the sky, the heat from the sun can come 8 them but the heat from the ground cannot. It 9 near us in the sky and makes the 10 hotter and hotter every year. Scientists call this the "greenhouse effect" because a greenhouse is a small glass 11 which is hot inside. It is used for 12 plants in cool countries. Many countries are 13 about the greenhouse effect. They are trying to stop factories and cars from sending 14 gases into the sky. Scientists are not sure when the world will get much hotter. Some people say that the greenhouse effect has 15 already and has begun to affect the world's weather. | ||||
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Everyone has his or her own dreams.They give us courage and confidence to keep us going through difficulties.Here__1__ some advice on how to realize our beautiful dreams.__2__ giving up is the key to making our dreams come true.We may fail from time to time, but we can learn from failure, correct our __3__ and try again until we achieve our goals.For that reason, no matter __4__ difficult problems we meet, we won't fail unless we give up our hopes.We will realize our dreams __5__ last if we do our best.Besides, in our society, most problems can't be__6__ by one person alone.Each of us is __7__ a small part of a machine.If one part isn't __8__, the machine can not work well.It's hard for a person who is away from the society to have a deep understanding of the world.Cooperation (合作) is becoming one of the __9__ ways for people living in the developing society.As a saying goes, “One tree doesn't make a __10__.”
( )1.A.is B.are C.be D.has
( )2.A.Always B.Often C.Never D.Usually
( )3.A.thoughts B.mistakes C.studies D.jobs
( )4.A.how B.what C.where D.why
( )5.A.from B.on C.at D.against
( )6.A.got B.solved C.asked D.made
( )7.A.without B.as C.like D.unlike
( )8.A.in time B.in order C.in need D.in surprise
( )9.A.most difficult B.hardest C.most important D.easiest
( )10.A.forest B.grass C.field D.hill
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