A．openB．relatedC．closeD．devoted
A. open
B. related
C. close
D. devoted
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According to the text, "nuclear tipped missiles" and "cannonball-size steel spheres" (Para. 5) ______.
A. are different in nature.
B. serve similar functions.
C. are identical to each other.
D. pose real challenges.
A．howB．whereC．howD．unless
A. how
B. where
C. how
D. unless
It can inferred from the 2nd paragraph that ______.
A. black workers are generous unless wrongly accused.
B. whites have a longer life expectancy than blacks.
C. black people may contribute much to welfare budgets.
D. whites receive less financial aid than blacks.
Under the law of thermodynamics, the universe is supposed ______.
A. to push forward progress.
B. to give rise to other life-forms.
C. to make for a total chaos.
D. to improve by wide margins.
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