better in 2010 World Expo is the duty of every citizen in Shanghai. A. Being servedB. Se

发布时间：2020-08-16 14:24:44

     better in 2010 World Expo is the duty of every citizen in Shanghai.
A. Being served
B. Serving
C. Serve
D. Having served

网友回答

A. Being served
B. Serving
C. Serve
D. Having served
解析：考查非谓语做主语要用动名词又因为描述的是一般情况所以用动名词的一般式。句意为：为2010世博会做好服务是我们每个上海市民的责任。
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