题目内容

A model or an experiment in a science class can help us see things which would_______ remain hidden.
A．thereforeB．yetC．otherwiseD．still
C

试题分析：副词辨析。A因此；B可是；C否则，要不然；D仍然；句意：科学课上的实验可以帮助我们看到要不然仍然隐藏的事情。故C正确。
点评：副词的词义辨析要放在上下文中进行，要根据语境来辨析。本题的otherwise考查较多。
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