题目内容
________twice a year,whether it is a car or a bus or a truck,is the rule that every driver must obey in this city.
A.Examining
B.Examined
C.Being examined
D.Having been examined
【答案】
C
【解析】
句中缺少的是主语,分词不作主语,故排除A、B项;从整个句子意思来看examine需要用被动式且用其一般式即可。
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