1______ such heavy pollution already，it may now be too late to clean up the river．
  A．Having suffered   B．Suffering     C．To suffer    D．Suffered

2 The Olympic Games，_____ in 776 B．C．，did not include women players until1912．  
A．first playing                B．to be first played     C．first played                 D．to be first playing  3 When I got back home I saw a message pinned to the door __
―Sorry to miss you；will call later．‖  
A．read         B．reads        C．to read         D．reading 4 —You were brave enough to raise objections at the meeting．  
—Well，now I regret _______ that．  A．to do      B．to be doing     C．to have done     D．having done  5 The purpose of new technologies is to make life easier，_______ it more difficult．  
A．not make     B．not to make    C．not making      D．do not make   6 _______ is a good form of exercise for both young and old．  A．The walk       B．Walking       C．To walk      D．Walk   7 ____ late in the morning , Bob turned off the alarm. A. To sleep       B. Sleeping       C. Sleep       D. Having slept  8．____ a letter from her parents, Lily is now looking forward to ____ from them. A. Having not received; hear         B. Not received; hear
C. Not having received; hearing        D. Receiving not; hearing  9. I would love _____ to the party last night but I had to work extra hours to finish a report.  
A. to go        B. having gone       C. going      D. to have gone 10. Mrs. Smith warned her husband _____ after drinking again and again.  
A. never to drive                   B. to never drive  
C. never driving                    D. never drive  【答案解析】   1-5 ACDDB   6-10 BACDA