If oil______on the frozen north coast in the 1960s, an 800-mile pipeline would not have been constructed to bring it to the south coast.
A．was not discovered
B．was discovered
C．had not been discovered
D．had been discovered

未分类题She claimed that he______able to give more intimate details if he had been properly qualified.A．have beenB．should have beenC．wereD．should be

未分类题Letters of recommendation received after the first of the month will not be reviewed by the admissions officer______ to your file.A．assignedB．assigningC．being assignedD．to assigning

未分类题They couldnt imagine his______to participate in the fall-recess outing.A．not to wantB．to not wantC．not wantingD．not want

未分类题They will continue______seven days a week until the building is finished.A．to workB．to workingC．workD．worked

未分类题Houseplants ______ constant attention are not suitable for working couples with little spare time.A．requiringB．to requiringC．requiredD．being required

未分类题【C2】A．only ifB．much asC．long beforeD．ever since

未分类题Contrary to the opinion of the members, the president should appoint______he thinks can do the job the most adequately.A．anyoneB．whoeverC．oneD．whom

未分类题The mad man was put in the soft padded cell of the hospital lest he______himself.A．injureB．had injuredC．injuredD．would injure

未分类题The alarm clock didnt ring this morning. You______it last night.A．need to have forgotten to windB．may have forgotten windingC．ought to have forgotten to windD．must have forgotten to wind

未分类题As always, the downtown area was the busiest with people______in theatres, restaurants and department stores.A．crowdedB．crowdC．being crowdedD．crowding

未分类题______his number for an hour only to hear a busy signal, she became impatient and called the operator for assistance.A．DialingB．DialedC．Having dialedD．To dial

未分类题Not only______tolerant of other peoples opinion, but he is also patient.A．he isB．is heC．he will beD．will he be

未分类题There must have been someone who had informed the owner of the bathing center of the sudden crack-down or he______able to escape the sweep.A．wouldn't beB．wouldn't have beenC．might have beenD．needn't have been

未分类题The national parks are very important for preserving many animals, who would ______run the risk of becoming distinct.A．insteadB．neverthelessC．thereforeD．otherwise

未分类题Some people may have been daunted by the task because of the difficulties it brings, but I do not know of______.A．them doing soB．any having done soC．their doing like thatD．any doing that way