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课文填空

  Exactly when the first people arrived in   1   as California, no one really knows.

  Scientists believe that these first setters crossed the Berlin Strait from Asia to Alaska   2   of a land bridge.

  Thousands were killed or   3   slavery.  4  , many   5   brought by Europeans.

  Cloning has two   6  .Firstly,…Secondly, it is valuable for research on   7   and for medical research on animals.…Many   8   to clone mammals failed.But at last the   9   of the scientists was rewarded in 1996   10  -the cloning of Dolly the sheep.

答案:
解析:

  1.what we now know

  2.by means of

  3.forced into

  4.In addition

  5.died from

  6.major uses

  7.new plant species

  8.attempts

  9.determination and patience

  10.with a breakthrough


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(1)

[  ]

A.

home

B.

pearl

C.

tree

D.

friend

(2)

[  ]

A.

could

B.

should

C.

would

D.

must

(3)

[  ]

A.

hide

B.

show

C.

gather

D.

wear

(4)

[  ]

A.

ordinary

B.

unfortunate

C.

unhealthy

D.

unknown

(5)

[  ]

A.

give

B.

turn

C.

move

D.

take

(6)

[  ]

A.

ordered

B.

suggested

C.

begged

D.

told

(7)

[  ]

A.

if

B.

before

C.

until

D.

as

(8)

[  ]

A.

refused

B.

agreed

C.

promised

D.

received

(9)

[  ]

A.

go

B.

fly

C.

dance

D.

stay

(10)

[  ]

A.

referring

B.

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showing

D.

saying

(11)

[  ]

A.

Clearly

B.

Carefully

C.

Certainly

D.

Quickly

(12)

[  ]

A.

flied

B.

dived

C.

fell

D.

ran

(13)

[  ]

A.

with

B.

below

C.

among

D.

beyond

(14)

[  ]

A.

came back

B.

came up

C.

came out

D.

came across

(15)

[  ]

A.

paid

B.

awarded

C.

fed

D.

praised

(16)

[  ]

A.

noticed

B.

watched

C.

threatened

D.

feared

(17)

[  ]

A.

stay

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hide

C.

show

D.

live

(18)

[  ]

A.

angry

B.

happy

C.

sorry

D.

lucky

(19)

[  ]

A.

go on

B.

keep on

C.

insist on

D.

move on

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[  ]

A.

excellent

B.

correct

C.

strict

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36.A.smooth       B.rough          C.broken             D.pretty

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45.A.lot            B.sheet          C.piece       D.pile

46.A.making       B.taking       C.keeping      D.bringing

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