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三校生英语选择题8题,求详解.

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三校生英语选择题8题,求详解.
1.He ____ have completed his work,otherwise he wouldn't be enjoying himself by the beach.
A.should B.must C.wouldn't D.can't.B 请问如何解释,为何A不行.
2.____ our food ______,we had to walk to a village for help.
A.Since,runs out.B.Because,run out.C.With,running out D.For,running out.A 可以嘛.since解释为 既然呀.
3.Don't be discouraged._____ things as they are and you will enjoy every day of your life.
A.Take B.To take C.taking D.taken..A .那 C呢.动名词开头嘛.
4._____ more and more forests were destroyed,some animals are facing the danger of dying out.
A.By B.With C.As D.For C.D 不可以吗.因为.
5.All the neighbors admire this family,_____ the parents are treating their kids like a friend.
A.why B.where C.which D.that..完全不理解- -.
6.He will have nothing to ____ if he refuses to listen to his teachers.
A.earn B.catch.C.gain.D.grasp.C.固定搭配嘛?那别的有什么搭配?
7.I promise to ____ the matter as soon as i get back to the head office.
A.look for.B.search for.C.enter into.D.look into.D.
8.Voices were ____ as the discussion between the two groups became more heated.
A.increased.B.repeated.C.raised.C.risen 那D呢.
第一题:must have done表示一定做了某事,而should have done表示本应做某事(实际没做),句意表示他一定是完成了他的工作,否则他在海边不会玩的那么开心.
第二题:A时态就有错误,后面是had,而A是runs,C表示伴随,可理解为由于、因为
第三题:祈使句,此举表示鼓励,应用祈使句.
第四题:as 是从属连词,说明一般的因果关系,它引导的从句通常放在句首,有时也可放句末.for 是并列连词,用来附带解释说明前一分句的原因或理由,for引导的并列句,一般放在所要说明的句子的后面.
第五题:从句意上理解,所有的邻居都钦佩这个家庭,在这父母对待孩子像朋友一样.可以理解成一个虚的地点.
第六题:nothing to gain一无所获.A表示挣得,B表示追赶,D表示抓住,掌握,C表示获得
第七题:look into调查,A、B表示寻找,C表示进入、加入.句意表示我许诺调查这件事情
第八题:rise 是不及物动词,没有被动语态.raise 是及物动词,在此题中表示提高,抬高.