单项选择题

Scientists have ------- for years that turbulence within the gaseous clouds found throughout the Milky Way stymies star formation, but some of the forces behind this disturbance remain -------.

A． doubted... insufferable
B． posited... unknown
C． argued... relative
D． assumed... exoteric
E． conveyed ... insuperable
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单项选择题
CARESS:AFFECTION::
A． flush: decency
B． salute: respect
C． collapse: ennui
D． obstruct: quandary
E． apprehend: dread
单项选择题
It can not be denied that the existing resources on earth will be depleted, but scientists are ------- to concede the inevitability of that day, ------- that new energies can be found in the near future.
A． bound... assuming
B． unprepared ... skeptical
C． hesitant... convinced
D． likely... realizing
E． eager ... hypothesizing
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