When the teacher came in, the students pretended _______ the text.
A.to readB.to be reading
C.to have readD.having read
B

試題分析:考查不定式用法。不定式的一般式to do表示與位于動詞同時發(fā)生,或者稍后發(fā)生;不定式的進(jìn)行式to be doing 表示與位于動詞同時發(fā)生。不定式的完成式表示在謂語動詞之前就發(fā)生。句意:當(dāng)老師進(jìn)來的時候,學(xué)生假裝在讀書。根據(jù)句意說明兩個動作是同時發(fā)生的,故使用不定式的進(jìn)行式。故B正確。
點評:不定式的不同形式有不同的用法:不定式的一般式to do表示與位于動詞同時發(fā)生,或者稍后發(fā)生;不定式的進(jìn)行式to be doing 表示與位于動詞同時發(fā)生。不定式的完成式表示在謂語動詞之前就發(fā)生。
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