超碰免费人人操|国产视频二区久久艹人人操|欧美激情第一页在线|久热最新无码中文视频|91精品国际成人|亚洲成人精品在线视频青青草|久草免费高清完整在线观看|你懂的AV在线日本黄网页|国产黄色AV日韩女同网|欧美成人色区导航片av

иԇ_ԇ}

l(f)rg:2017-06-04 ݋:younian

иԇZxԇ}

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)չҪģǮ(dng)С56qĕrxش

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

ȱeZґ(yng)ԓ adj.~ֻxD.

gģLĵڶСԼw

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

that(do)һZľmouthpiece~A F(xin)ɂ^Z~e;BD(yng)ԓñ;

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

ԶZľֻwhich(do)ԶZľ

gģ20rgĿy(tng)نT_(d)ˎװقһo(j)ǰ߀ָɔ(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

c(gu)ɶZľ䣬s`öZľB~thatȥͺˡ

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{ʽڡ

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_ʼľ(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_(d)e`ijwhether or not

gģ•J(rn)\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)~Ώ(f)(sh)`ijminerals

gģг^1ǧNV|(zh)֪кܶ඼ͨ^_ĻW(xu)MɣY(ji)Y(ji)(gu)ԱF(xin)

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|(zh)_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(ti)`ãijdecays

gģ(dng)ӏԭӺаl(f)ĕrDz(wn)˥ˏĶγһ|(zh)Ӻһ

Pumpkina䣺 ޸Ğdecayingܸm unstable һ~is(do)

]
T]