The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.   

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

 We can never expect    bluer sky unless we create     less polluted world.

A. a; a                                   B. a; the

C. the; a                                D. the; the

 Some people fear that ________ air pollution may bring about changes in _______ weather around the world.

A. /; the       B. the; /       C. an; the        D. the; a 

 This area experienced.       heaviest rainfall in            month of May.

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

 What I need is _____ book that contains _____ ABC of oil painting.

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

 The terrible accident almost_____ the driver his life.

A. valued          B. counted     C. took       D. cost

 How do you like the curtains?

—Well, I’m afraid they don’t ________ very well with the wallpaper.

A. go      B. match     C. suit      D. fit

 Once out of the earth’s gravity, the astronaut is        by the problem of weightlessness.

A. affected                    B. effected                   C. related                 D. offered

 The beauty of the place ______ them to pause in their hike and rest a while.

A. allowed                      B. switched                  C. invited               D. addicted

 The spacewalk performed by Chinese astronaut Zhai Zhigang on Saturday afternoon          a major breakthrough in China's space program

A. predicted           B. told               C. marked              D. signed