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精英家教網 > 高中英語 > 題目詳情

_____earth scientists understand how and why earthquakes happen, forecasts are usually inaccurate.

A．As

B．While

C．Because

D．If

考查連詞特殊用法。While然而；結合句意可知B正確。句意：盡管地震科學家理解地震是如何為什么發生，但是預測通常是不準確的。

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