题目内容
15．Football to our school subjects last year．（ ）| A． | is added | B． | adds | C． | was added | D． | added |
分析 去年足球增加到了我们的学校课程中去了．
解答 答案：C
首先根据句中的时间状语last year，判断句子中的谓语动词用一般过去时，主语Football 是谓语动词add的承受者，二者形成被动关系所以用被动语态，故该空处为一般过去时的被动语态，其结构为：主语+was/were+及物动词的过去分词，主语Football是单数名词，be动词用was，add的过去分词是added，套用结构，故选C
点评 本题考查时态和语态．每个时态都有标志词，熟记这些标志词是做题的关键．在没有时间状语的情况下可以根据语境来对时态做出判断．判断语态的关键则是观察主语是谓语动词的执行者还是承受者，二者结合即可选出正确答案．
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