The morning class ______ over, students rushed out of the classroom for lunch.

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问题 The morning class ______ over, students rushed out of the classroom for lunch.

选项 A、was
B、is
C、having been
D、being

答案D

解析 由题干可知,前一分句是独立主格结构,从而排除A 和B 。又由于前一分句中的副词over已有结束之意,没有必要再用现在分词的完成式来体现时间,故选D 。
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