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Almost _______ by man, the Antarctica is the only continent in the world that has kept its primitive ecological balance.

[  ]

A. untouched

B. being untouched

C. to be untouched

D. have been untouched

答案:A
提示:

过去分词可以表示原因,表示一个被动的业已完成的动作.句意:几乎无人涉足南极大陆,因此它是世界上惟一一片尚保持着原始生态平衡的陆地.


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1.

A.though

B.and

C.but

D.since

 

2.

A.knowledge

B.view

C.target

D.experience

 

3.

A.forced

B.limited

C.reduced

D.increased

 

4.

A.left

B.doubted

C.paused

D.hesitated

5.A. occupied     B. unfamiliar    C: mixed    D. popular

6.

A.get up

B.put up

C.set up

D.cheer up

 

7.

A.impossible

B.possible

C.easy

D.disturbing

 

8.

A.away

B.down

C.off

D.for

 

9.

A.ask

B.try

C.practice

D.accept

 

10.

A.finished

B.started

C.reserved

D.cancelled

 

11.

A.traveler

B.reporter

C.writer

D.thinker

 

12.

A.take

B.head

C.make

D.change

 

13.

A.careful

B.free

C.professional

D.advanced

 

14.

A.lose

B.win

C.manage

D.remember

 

15.

A.different

B.same

C.old

D.bad

 

16.

A.nothing

B.something

C.anything

D.everything

 

17.

A.sticks

B.comes

C.opens

D.drinks

 

18.

A.learned

B.hoped

C.forgotten

D.attempted

 

19.

A.weaker

B.braver

C.worse

D.luckier

 

20.

A.trouble

B.failure

C.victory

D.challenge

 

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