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__________the teacher entering  the classroom, the boy pretended _______ the text.
A.To see ; to readB.Seen; readingC.Seeing; to be readingD.Seeing; to have read
C

试题分析:see和其逻辑主语之间是主动关系,故用现在分词作时间状语;pretend后可跟不定式的三种形式:to do (一般式),to be doing(进行式),to have done(完成式),分别表示现在、进行和完成的动作,这里表示进行,故用to be reading  。
点评:解题思路,①解析句子结构,确定设空在句子中充当的功能(如状语、定语或宾补);②找准相关动词的逻辑主语,确定该动词与逻辑主语是什么关系(主动还是被动);③搜索句子中相关的时间信息,确定非谓语动词的恰当形式;④将该选项置入空中,看是否能够做到字从意顺,或是否能传达有效信息、完成交际任务。对于固定结构的具体用法,平时要多归纳、总结和记忆。
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