单项选择题

Investigators agreed that passengers on the airliner（）at the very moment of the crash.

A. ought to die
B. must have died
C. must be dying
D. should have died

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单项选择题

Philosophers believe that desire, hatred and envy are negative emotions which（）the mind and lead it into a pursuit of power and possessions.

A. distort
B. reinforce
C. exert
D. scramble

单项选择题

We all enjoy our freedom of choice and do not like to see it（）when it is within the legal and moral boundaries of society.

A. compacted
B. dispersed
C. delayed
D. restricted

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