The products of the chemical industry make a major contribution to present-day standards of living, and life today______impossible without these products.
A．is
B．has been
C．would be
D．would have been

未分类题If John were to resign and if Henry were elected to take his place, we______ more vigorous leadership.A．have hadB．should have hadC．should haveD．had

未分类题Jenny Edward divulged her intention of trying vaccination under a bond of secrecy because she feared ridicule if they______.A．have failedB．should failC．failedD．being failed

未分类题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 discoveredB．was discoveredC．had not been discoveredD．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