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1、The book has been translated into thirty languages since i

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1、The book has been translated into thirty languages since it (C)on the market in 1973.
A.had come B.has come C.came D.comes
2、In the past few years,My Heart Will Go On was a popular song among young people,(A)were often heard singing it at parties.
A.who B.which C.they D.that
3、Try not to cough more than you can(D)since it may cause problems to your lungs.
A.check B.allow C.stop D.help
4、After days of search,the police have found(C)is considered to be the lost antique.
A.which B.where C.what D.how
5、Anyone,once(A) positive for H7N9 flu virus,will receive free medical treatment from our government.
A.tested B.being tested C.to be tested D.to test
6、At the end of the meeting,it was announced that an agreement (B).
A.has been reached B.had been reached C.has reached D.had reached
1.主句为"现完"时,从句就用"一般过去时",故选C.
2.此题考查非限制性定从,根据句中已有it来指代a popular song---My Heart Will Go On可知,
定从的先行词不是a popular song而是young people,所以不能选which;
先行词young people指人,且在定从中作的宾语,因此用who引导定从,故选A.
另:that不能引导非限制性定从;they根本不能引导定从.所以也不能选CD.
3.此题是根据句意及选项的词意来判断的.help在这表示"避免",
not more than one can help "能避免...就不...","能不...就尽量不..."
句意:由于咳嗽可能会导致肺部出现问题,因此能不咳嗽就尽量少咳.
4.found后是一个宾语从句,且宾从中需要一个主语,而既能引导宾从,又能做主语的只有what和
which; 但which用在此句,意思不合题意; 故答案选C.what.
5.此题考查:"once+过去分词"做条件状语的用法,相当于条件状语从句:once he is tested...
由于状语的主语跟anyone是指的同一人,并且从句中含有be动词,因此可将从句中的主语及be动
词一起省略.于是就剩下了once tested.所以答案选A.
6.was announced是一般过去时态,在此之前"协议已经达成",故用过去完成时被动语态.
所以选B.had been reached.