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31.In Australia there are over 140 species of snakes, many of ______ are extremely dangerous.

    A.them      B.that        C.which        D.those

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30.-Do you think it wise for parents to try to do everything for their children?

    -No, that is just ______ they are mistaken.

    A.what         B.where       C.when         D.because

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29.The fighting broke out on April 14, ______ 3 innocent people with more than 20    .

20090519
 
    A.killed; injured                B.killing; injured

    C.killed; injuring                D.killing; injuring

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28.Lucy visited quite a few museums ______ her stay in England.

    A.during        B.among       C.while         D.since

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27.-David wants to be another Yao Ming after he graduates from school.

    -Are you joking? He will never ______ a person like Yao Ming.

    A.meet         B.get          C.turn         D.make

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26.Henry,______ the experiment as I showed you just now, or you will not pass.

    A.do           B.does         C.doing        D.done

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25.Seeing the guard coming, away______.

    A.the two boys ran            B.were the two boys running

    C.ran the two boys            D.did the two boys run

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24.There is no food left and the grocery stores are shut so you have to ______.

    A.go without     B.go out       C.go mad         D.go wrong

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23.-Nobody will ever know who stole the car.

    -I don't think so.The thief______ and is being questioned by the police.

    A.has caught               B.has been caught

    C.is catching               D.will be caught

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22.-Did you attend your son's graduation ceremony yesterday?

    - I______, but I had to go to an important meeting.

    A.used to      B.ought to       C.must have       D.should have

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