—How did she get infected?
—She ____ the viruses without any protection.
A．exposed toB．had exposed toC．was exposed toD．has exposed to
C

試題分析：考查固定詞組。固定詞組be exposed to…遭受..暴露…句意：—她怎么受到感染的？—她沒有任何的保護(hù)，直接暴露在病毒之下。故C正確。
點(diǎn)評：對于固定詞組，要在平時加強(qiáng)記憶和辨析。be exposed to…遭受..暴露…
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