--- Look! So many colorful bicycles in two lines over there.--- They're for public. This ______ of green smart traffic is everywhere in Xiangyang city.

题型：单选题题类：常考题难易度：普通

2016年湖北襄阳市初中毕业生学业水平考试

— Look! So many colorful bicycles in two lines over there.

— They're for public. This ______ of green smart traffic is everywhere in Xiangyang city.

A、number B、pair C、kind D、piece

举一反三

—They are _______, they speak _______.

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