（2015•云南曲靖）——During the APEC summit（峰会)，Beijing's sky was so blue and clear.——It APEC blue.But too bad it no longer stays that way．

题型：单选题题类：真题难易度：普通

——During the APEC summit（峰会)，Beijing's sky was so blue and clear.——It APEC blue.But too bad it no longer stays that way．

A、is called B、are called C、called D、calls

举一反三

—Let's collect and put them in the right place so that they can be used conveniently.

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