It was not until dark _____ he found _____ he thought was the correct way to solve the problem.
A．that; thatB．that; whatC．when; whatD．when; that
B

試題分析：考查強調(diào)句型和賓語從句。本題第一空是強調(diào)句型，強調(diào)的是時間狀語not until dark;第二空是動詞find的賓語從句，what在句中做主語。句意：直到天黑他才發(fā)現(xiàn)了他認為是正確的解決這些問題的方法。故B正確。
點評：強調(diào)句型的基本結(jié)構(gòu)為It is/was被強調(diào)成分that/who其它成分；其最大的特點就是去掉it is/was…that/who…句子仍然成立。要注意強調(diào)句型能強調(diào)除謂語動詞以為的所有的句子成分。在考查的時候，經(jīng)常會把強調(diào)句型和定語從句結(jié)合在一起考查，要注意分析句子的成分。賓語從句要注意引導(dǎo)詞的用法區(qū)別。
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