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【单选题】
Which of the following statement is NOT true about the political system in America?A.
It continued to exist along with the rivalry of these parties.
B.
Americans are quite confident about it.
C.
It is workable all the time.
D.
Efforts to break up the system have been long.
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举一反三
【单选题】There has been a（n）____of sadness in the small town since a boy was drowned in the river．
A.
scene
B.
atmosphere
C.
condition
D.
appearance