Life today is   1   than it was hundreds of years ago, but it has   2   some new problems. One of the biggest problems is pollution. We can see it, smell it, drink it, and   3   hear it.

  4   has polluted Earth. The more people, the more because there were not   5   people. Now man is slowly polluting   6   world.

Air pollution is still the most serious among (在……之中) all kinds of pollution. It is bad for all   7   animals. It is caused by heavy traffic. It is said that the situations will be much better if people ride bikes   8   driving ears. When you are riding , there is no pollution. But even in developing countries, most people don’t go to work by bike. It is not because bikes are expensive or people are tired if they ride to work, but because the roads for the cars become   9   , more people put away their bikes and go to work by car or by bus, then things are getting   10    .

(   ) 1. A. happy             B. harder

      C. easier              D. more hardly

(   ) 2 . A. take              B. taken

       C. bring             D. brought

(   ) 3 . A. but               B. even

       C. however           D. if

(   ) 4 . A. Man              B. A man

       C. Persons            D. A person

(   ) 5 . A. too much          B. much too

       C. so many           D. so much

(   ) 6 . A. the whole          B. whole the

       C. the all             D. all the

(   ) 7 . A. live               B. alive

       C. lively             D. living

(   ) 8 . A. and               B. because of

       C. but               D. instead of

(   ) 9 . A. better             B. harder

       C. well               D. worse

(   ) 10 . A. better and better         B. worse and worse

        C. the better; the better      D. the worse; the worse