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        lrg:2017-06-04 ݋:younian

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        1. While play is important at all levels of human development _________ takes on particular significance when children are five and six years old.

        A. it

        B. and

        C. which

        D. because it

        𰸣A

        ȱZit @ʽZ

        gģِӴ˵İlչҪģǮС56qĕrxش

        2. During the second and third years of life children gain _________ over their bodies.

        A. control increasing

        B. increasing to control

        C. control is increasing

        D. increasing control

        𰸣D

        ȱeZґԓ adj.~ֻxD.

        gģLĵڶСԼwˡ

        3. All brass instruments use a mouthpiece _________ into a long cone-shaped tube.

        A. is inserted

        B. that inserted

        C. that is inserted

        D. and inserted

        𰸣C

        thatһZľmouthpiece~A Fɂ^Z~e;BDԓñ;

        gģе~ܘһLFͲιĴ

        4. By the mid-twentieth century United States presidential staffs _________ had numbered fewer than ten a century earlier numbered in the hundreds.

        A. as

        B. that they

        C. which

        D. and

        𰸣C

        ԶZľ䣬ֻwhichԶZľ

        gģ20rgĿyنT_ˎװقһoǰ߀ָɔ

        5. In 1966 only 60 percent of all five year olds in the United States attended kindergarten _________ in 1985 almost 82 percent did so.

        A. with

        B. which

        C. whether

        D. while

        𰸣D

        гF˃ɂ^ZȱB~

        gģ1966꣬5qСֻ60%ą׃@1985׺82%С׃@ˡ

        6. By 1920 the area of the United States under cultivation had more than doubled in just 50 years and the national population that surpassed 100 million.

        𸣣B

        cɶZľs`öZľB~thatȥͺ

        gģ1920_50ѽ˃ɱȫ˿Ҳ^100f

        7. Some areas of the deep sea are vulnerable frequent natural disturbances taking the form of intense currents mud slumps low oxygen and upwellings.

        𰸣A

        c~e`ijfrequently vulnerable natural disturbances

        gģһЩطܵȻɔ_@Щɔ_Լ{ʽ

        pumpkina䣺 Ǹijvulnerable to frequent natural disturbances

        8. In the United States the first roads were paved in colonial times first with logs latest with cobblestones or brick depending on the region.

        𰸣B

        c~ԻʾȺĠBrlater

        gģ·ֳؕr䁵ġһ_ʼľ؅^ͬZʯuK

        9. In physics sound is considered to be the waves of vibratory motion nether or not they are heard by the human ear.

        𰸣C

        cB~ʹñ_e`ijwhether or not

        gģ•J\ӰlIJ˶ܲ Ҋ

        10. Over one thousand mineral are known most of which are characterized by definite chemical composition crystalline structure and physical properties.

        𰸣B

        cɔ~Ώ͔`ijminerals

        gģг^1ǧNV|֪кܶ඼ͨ^_ĻWMɣYYԱF

        11. The layers of an elephant's tusk are deposited from the pulp yet that the innermost layer is the newest.

        𰸣C

        cB~`ijsoso thatһ

        gģLķ֌Ǐ|_ʼeһµġ

        12. Butane is found into both oil and natural gas.

        𰸣B

        c~`ijin

        gģwǏʯͺȻҵ

        13. When expelled from the nucleus of an atom a neutron is unstable and decay to form a proton and an electron.

        𰸣C

        c^ZrB`ijdecays

        gģӏԭӺаlĕrDzģ˥ˏĶγһ|Ӻһ

        Pumpkina䣺 ޸Ğdecayingܸm unstable һ~is

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