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l(f)rg: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˵İl(f)չҪǮС56qĕrxش

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 F(xin)ɂ^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

gģ20rgĿy(tng)نT_ˎװقһoǰ߀ָɔ(sh)

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(xin)˃ɂ^ZȱB~

gģ19665qСֻ60%ą׃@1985׺82%С׃@

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(jng)˃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~ԻʾȺĠB(ti)rlater

gģ·ֳؕr䁵һ_ʼľģ(j)؅^(q)ͬ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\Ӱl(f)IJ˶ܲ 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(sh)~Ώ͔(sh)`ãijminerals

gģг^1ǧNV|֪кܶ඼ͨ^_ĻWMYYԱF(xin)ˡ

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|_ʼeһµ

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

𰸣B

c~`áijin

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(ti)`ãijdecays

gģӏԭӺаl(f)ĕrDz(wn)ģ˥ˏĶγһ|Ӻһ

Pumpkina䣺 ޸Ğdecayingܸm unstableУ һ~is

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