9.The earth is our home.We must take care of it.Life today is easier than it was(1)Byears ago,but it has brought some new problems.One of the biggest problems is pollution.We can see it,smell it,drink it and even hear it.
Man has polluted the(2)C.The more people,the more pollution.Many years ago,the problem was not so serious because there were not so(3)Cpeople.When the land was used up or the river was not clean in a place,man went to(4)Dplace.Now man is slowly polluting the whole world.
(5)Apollution is still the most serious,it's bad for(6)Cthings in the world.Many countries don't let people burn(7)Afor air in the houses and factories in the city.Pollution by SO2 is now the most dangerous kind of air pollution.It's caused by heavy traffic.People say it's(8)Bto ride bikes.When you are riding,there is no pollution.But even in developed countries,most people don't go to work by bike.It's not because bikes are exp ensive or people are tired if they ride to work.It's because the number of cars on the roads becomes larger.So more people(9)Ctheir bikes and go to work by car,then things are getting worse and worse.We should have special roads only for bikes and make it(10)Ddifficult and expensive for drivers to take their cars into the city that they will go back to using their bikes.
Man has polluted the(2)C.The more people,the more pollution.Many years ago,the problem was not so serious because there were not so(3)Cpeople.When the land was used up or the river was not clean in a place,man went to(4)Dplace.Now man is slowly polluting the whole world.
(5)Apollution is still the most serious,it's bad for(6)Cthings in the world.Many countries don't let people burn(7)Afor air in the houses and factories in the city.Pollution by SO2 is now the most dangerous kind of air pollution.It's caused by heavy traffic.People say it's(8)Bto ride bikes.When you are riding,there is no pollution.But even in developed countries,most people don't go to work by bike.It's not because bikes are exp ensive or people are tired if they ride to work.It's because the number of cars on the roads becomes larger.So more people(9)Ctheir bikes and go to work by car,then things are getting worse and worse.We should have special roads only for bikes and make it(10)Ddifficult and expensive for drivers to take their cars into the city that they will go back to using their bikes.
1.A.hundred | B.hundreds of | C.hundred of | D.hundreds |
2.A.moon | B.star | C.earth | D.sun |
3.A.lot | B.little | C.many | D.much |
4.A.others | B.the others | C.the other | D.another |
5.A.Air | B.Food | C.Water | D.Noise |
6.A.life | B.live | C.living | D.lives |
7.A.something bad | B.bad something | C.something good | D.good something |
8.A.least | B.best | C.most | D.worst |
9.A.put on | B.look at | C.put away | D.look up |
10.A.suite | B.such | C.very | D.so |
6.It astonished him to see the bacteria _________the mould dead,which meant that the mould had killed them.( )
A. | surrounded | B. | surrounding | ||
C. | to surround | D. | being surrounded |
5.If penicillin __________available,many people _________from sickness or even small wounds during World War II.( )
0 140042 140050 140056 140060 140066 140068 140072 140078 140080 140086 140092 140096 140098 140102 140108 140110 140116 140120 140122 140126 140128 140132 140134 140136 140137 140138 140140 140141 140142 140144 140146 140150 140152 140156 140158 140162 140168 140170 140176 140180 140182 140186 140192 140198 140200 140206 140210 140212 140218 140222 140228 140236 151629
A. | were not,would die | B. | were not to be,would die | ||
C. | should not be,would have died | D. | hadn't been,would have died |