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单项选择(每小题1分，共15分)
从每小题所给的四个选项 (A、B、C、D)  中，选出可以填入空白处的最佳选项。
1.—Are you done with the book I gave you?
                 .I'm still reading the last chapter.
A.Hard to say                    B.Not quite               
C.Of    course                   D.It all depends
2.We all need to get involved in saving energy                 it's at work, at home, or at school.
A.unless                 B.once                
C.whether                D.because
3. We                 quite enough work for the morning; now let's take a break.
A. have     done            B.will  do                            
C. had    done              D.were doing
4. While rock-climbing, you need to remain very                 .so that you won't make any
dangerous errors.
A.satisfied             B.focused                                 
C.amused                D. delighted
5. Students are encouraged to take control of their own learning,                 just depending on the teacher.
A.rather  than       B.regardless of           
C.due       to       D.in   terms   of
6.—How's the project going?
—            . All we have to do is finish the last bit of work.
A. Easy come easy go                   B.Far from it
C.By all means                         D. So far so good
7.Great improvements in public health have been brought about by                 in medical
science.
A.traditions         B.advances                               
C.pressures          D.examples
8.William Hastie once suggested that history informs us of past mistakes                 we can learn without repeating them.
A.from    which               B.in  which                        
C.with    whom                D.for   whom
9.China's National Highway 318,                  over 5,000 kilometers from Shanghai to Zhangmu,Tibet, is known as the "heavenly road" for its amazing views.
A.to extend                B.extended                 
C.extending                D.being  extended
10.As working from home becomes                  common, people are finding it easier to combine parenthood with a full-time career.
A.increasingly        B.equally                    C. nervously               D.confusingly
11.Henry  David  Thoreau  was  happy  to                  from  social  life,  seeking  a  harmonious relationship with nature in the quietness of his life.
A.judge           B.differ                       C. withdraw               D.benefit
12.Currently, about 35,000 works                  in over 300 rooms in the Louvre, and it would take a lifetime to see everything.
A. were displaying                                  B.are  displaying
C.were being displayed                              D.are being displayed
13. What puzzles Lily's friends is                  she always has so many crazy ideas. A.whether         B.why                         C. what                       D.when
14.It used to be that you                  drive for miles here without seeing another person, but now there are houses and people everywhere.
A.need             B.should                     C. could                      D.must
15. At the Chinese art festival, there are different stands                  artists  demonstrate  their skills and teach the visitors.
A.where            B.which                      C.that                          D.when

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