题目内容
11．A good teacher has to be armed with the ability to keep students _______ throughout their learning process．（ ）| A． | motivating | B． | motivated | C． | motivate | D． | to be motivated |
分析 一名好老师必须具备让学生在学习的整个过程中受到激励的能力．
解答 答案：B
题干中非谓语动作motivate作keep的宾语补足语，motivate与students之间构成动宾关系，要用被动，即keep students motivated让学生受到激励；句意表达的是客观事实，不是未发生的动作，不能用动词不定式．故选B．
点评 过去分词是非谓语动词的一种，用法很灵活，分为简单式done（表示与谓语同时或几乎同时发生的动作）；完成式having been done（表示先于谓语的动作）．学习时，要把握其用法特征：表示被动和完成．同时还要注意区分现在分词和不定式．
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（41）B，in 1910，Martha's father took her to see a dance performance，which then （42）C her．
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