Liu Xiang is believed _____ over $ 20 million in advertisements last year alone.
A．to earnB．have earnedC．to have earnedD．having earned
C

試題分析：考察不定式用法。本句指含有固定搭配sb/sth be believed to do sth據(jù)說某人做某事；如果這件事情是已經(jīng)發(fā)生的事情，就使用不定式的完成式。如果是將要發(fā)生的事情，就用一般式。本句中的賺的$ 20 million是去年發(fā)生的事情，故使用完成式來表示。故C正確。
點(diǎn)評：不定式的用法要注意其余謂語動(dòng)詞的先后關(guān)系，如果發(fā)生在謂語動(dòng)詞之前，就使用不定式的完成式。如果和謂語動(dòng)詞同時(shí)發(fā)生就使用不定式進(jìn)行式。如果發(fā)生在謂語動(dòng)詞之后，也就是將來，就使用不定式的一般式。
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