III.单项填空
1.The lecture ______, he left his seat so quietly that no one complained that his leaving distured the speaker.
A.began B.beginning C.having begun D.being beginning
2.Such ______ the case, I have no other choices.
A.being B.is C.was D.to be
3.Darkness ______ in, the young people strolled on the streets.
A.set B.setting C.has set D.was set
4.With all factors ______ ,we think this program may be better than all the others in achieving the goal.
A.being considered B.considering C.considered D.are considered
5.A new technique ______, the production increased by 20 percent.
A.to have been worked out B.having worked out
C.working out D.having been worked out
6.On the top was the clear outline of a great wolf sitting still, ears ______, alert, listening.
A.pointed B.pointing C.are pointed D.are pointing
7.Walter offered us a lift when he was leaving the office, but our work ______, we didn’t accept the offer.
A.not being finished B.not having finished
C.had not been finished D.was not finished
8.There are various kinds of metals, each ______ its own properties (特性).
A.has B.had C.to have D.having
9.The old man stood under a big tree, ______.
A.a pipe in mouth B.with a pipe in mouth
C.pipe in mouth D.pipe in his mouth
10.The production ______ steadily, the factory needs an ever-increasing supply of raw material (原料).
A.has gone up B.is going up C.having gone up D.being gone up