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(2012·辽宁高考)This machine is very easy ________. Anybody can learn to use it in a few minutes.
A.operatingB.to be operating
C.operatedD.to operate
D
选D 考查非谓语动词。在句型“主语+be+adj.+to do”中,常用不定式的主动形式表示被动含义,故选D。
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