She smiled happily，________ a set of amazing white teeth to us.A．exposingB．being
题型：不详难度：来源：
| A．exposing | B．being exposed | | C．exposed | D．to expose |
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答案
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解析
试题分析：句意：她高兴地笑着，露出了一副雪白的牙齿。She 与expose是主动关系，所以用现在分词exposing表示伴随，故选A。
考点： |
举一反三
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