______ there is little we can do to modify the weather, we can at least know what kind of weather to expect.

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问题 ______ there is little we can do to modify the weather, we can at least know what kind of weather to expect.

选项 A、Since
B、When
C、While
D、Unless

答案C

解析 逻辑关系题。本句的意思是:尽管我们在改变天气方面无能为力,但我们至少(at least)可以知道天气未来的变化。本句的关键点是:while除引导时间状语从句外,还可引导让步状语从句,意为“尽管,虽然”。
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