单项选择题

So conservationists hope they can __________ the area's outstanding natural beauty and satisfy the tourists, too.

A．reserve
B．retain
C．preserve
D．sustain
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I felt very __________ among all those scholars as each of them has made substantial contributions to global environment reservation study.
A．influential
B．inferior
C．superior
D．subordinate
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There are three aspects of the __________ to the epidemic in Britain that make people terribly uneasy.
A．comment
B．impression
C．reaction
D．comprehension
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