C. skilled                             D. competent

Ⅱ . 完形填空。从 A 、 B 、 C 、 D 四个选项中，选择一个正确答案，并将正确选项的字母写在答题纸的相应位置上。 ( 本大题共 15 小题，每小题 1 分，共 15 分 )

   Fill in each blank in the passage with the most likely answer. (15 points)

        The habit of watching TV usually begins before children start attending school.    26    the time the average child finishes high school, he or she     27    18,000 hours in front of a TV set as against 12,000 hours in a   28    .

        Parents are concerned about these     29    . Violence in TV shows for children also worries them.    30    a cartoon cat beating up a cartoon mouse with a baseball bat may have a     31    effect on the young minds. Studies indicate that children    32    to violence may turn aggressive.

        Parents are also concerned about the commercials on TV. They feel that these programs    33    have no commercial at all, because young   34    are not mature enough to deal with the claims made by   35    .

         Even though most parents gave high marks to “ Sesame Street ” and   36    like it in educational TV programs for children some critics feel that the   37    of watching hours of TV every day   38    children into bored and passive consumers of their world.

        Until we know   39    about the negative effect of watching TV, perhaps it would be wise to put a warning on TV sets such as   40    on cigarette packages: “ Children: Watching Too Much Television May Be Harmful to Your Developing Mind. ”

26. A. At             B. On             C. By           D. Before