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几道网上cet3的选择题没有答案,

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几道网上cet3的选择题没有答案,
RT,以及我的回答.求尽量标准的答案.不确定请标明噢~A 16.When I am away _____ business,I contact my office every day by email.A.with B.of C.on D.to B 17.In addition to economic considerations,there are other reasons _____ people work long hours.A.what B.why C.when D.where C 18.There may be a need for retraining if you expect employees _____ new technology.A.using B.use C.to use D.used B 19.A survey suggests that nearly one in six children has difficulty _____ to talk.A.to learn B.learning C.learn D.learnt A 20.It was in their London branch _____ we met and discussed the issue.A.that B.which C.how D.what B 21.The decision about such a big project can not be made _____ each member of the board agrees.A.if B.unless C.though D.as D 22.There was no proof to show that Charles had committed the crime,_____ he was set free.A.but B.for C.or D.so D 23.Medical accidents _____ by drugs have attracted much attention in that country.A.causing B.to be caused C.be caused D.caused A 24.No sooner _____ than I realized I’d left the document at home.A.have we sat down B.had we sat down C.we had sat down D.we sat down A 25.the sales department of a company is engaged in _____ the products and making profits.A.selling B.sell C.being sold D.having sold
几道网上cet3的选择题没有答案,
16题选C,on business有出差的意思;
17题选B,reasons后边引导的是一个定语从句,引导词用why;
18题选C,考查短语expect sb to do sth;
19题选B,考查短语have difficulty (in) doing sth 做某事有困难;
20题选B,branch后是一个定语从句
21题选B,在此题中unless译为除非;
22题选D,这两个分句之间是是因果关系;
23题选D,caused在这里表示被动;
24题选B,因为no sooner.than.一……就……,否定词提前要倒装;
25题选A,考查短语be engaged in doing sth,忙于做某事.
再问: 谢谢~20题是it was.... that的强调句 应该选a啊
再答: 哦!不好意思,20题是一个强调句型,确实应该选that.