精英家教網 > 高中英語 > 題目詳情
It is not until the disease has progressed to AIDS ____a person begins to look sick.
A．whoB．thatC．whereD．before
B

試題分析：考查強調句型。本題強調的是時間狀語從句not until the disease has progressed to AIDS。句意：直到這個病發(fā)展為艾滋病的時候，這個人看起來才很虛弱。故B正確。
點評：強調句型的基本結構為It is/was被強調成分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。要注意強調句型能強調除謂語動詞以為的所有的句子成分。在考查的時候，經常會把強調句型和定語從句結合在一起考查，要注意分析句子的成分。
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