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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
gģِ(du)(g)Ӵ˵İl(f)չҪǮ(dng)С56qĕr(sh)xش
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.
gģL(zhng)ĵڶС(du)Լw(qing)
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)һ(g)Zľmouthpiece~A F(xin)ɂ(g)^Z(dng)~e(cu);BD(yng)ԓñ(dng);
gģе~ܘһ(g)L(zhng)FͲιĴ
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
gģ20r(sh)g(gu)Ŀy(tng)نT_(d)ˎװق(g)һ(g)o(j)ǰ߀ָɔ(sh)ء
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
(g)гF(xin)˃ɂ(g)^ZȱB~
gģ19665qСֻ60%ą׃@198582%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(din)(gu)ɶZľs`öZľB~thatȥͺ
gģ1920(gu)_50ѽ(jng)˃ɱȫ(gu)˿Ҳ^100(g)f
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(din)~e(cu)`ijfrequently vulnerable natural disturbances
gģһЩطܵȻɔ_@Щɔ_Լ{ʽ
pumpkina(b)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(din)~ԻáʾȺĠB(ti)r(sh)later
gģ(gu)·ֳؕr(sh)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
c(din)B~ʹñ_(d)e(cu)`ijwhether or not
gģJ(rn)(dng)\(yn)(dng)l(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
c(din)ɔ(sh)~Ώ(f)(sh)`ijminerals
gģг^1ǧNV|(zh)֪кܶͨ^_ĻW(xu)MY(ji)Y(ji)(gu)ԱF(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
c(din)B~`ãijsoso thatһ
gģL(zhng)ķǏ|(zh)_ʼeһµ
12. Butane is found into both oil and natural gas.
𰸣B
c(din)~`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(din)^Zr(sh)B(ti)`ãijdecays
gģ(dng)ӏԭӺаl(f)ĕr(sh)Dz(wn)˥ˏĶγһ(g)|(zh)Ӻһ(g)ӡ
Pumpkina(b)䣺 Ğdecayingܸm unstable һ(g)(dng)~is(do)