24、        parents say and do has a life-long effect on their children.

A. That                        B. Which                      C. What                       D. As

20、__________ the silence for the pauses, we could hear each other’s breathing and could almost bear

our own heartbeats.  

A. In            B. For            C. Under            D. Between

19、Polar bears live mostly on ________ sea ice, which they use as _______ platform for hunting seals.  

A. a; a            B. a; the           C. 不填; a            D. the; 不填

18、The biggest problem for most plants, which ________ just get up and run away when threatened,

is that animals like to eat them.  

A. shan’t           B. can’t           C. needn’t          D. mustn’t

17、As the years passed, many occasions—birthdays, awards, graduations—________ with Dad’s flowers.

A. are marked      B. were marked      C. have marked      D. had marked

16、It’s hard for him playing against me. I’ve got nothing to play for, but for him, he needs to win so

________.

A. far            B. well          C. little           D. badly

15、To save class time, our teacher has ________ students do half of the exercise in class and complete

the other half for homework.

A. us            B. we           C. our              D. ours