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
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