______ is known to all, the earth moves around the sun once a year.

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问题 ______ is known to all, the earth moves around the sun once a year.

选项 A、That
B、As
C、What
D、It

答案B

解析分析句子结构可知，本句缺少一个连接词来引导非限制性定语从句，并且该连接词在从句中作主语，指代“the earth moves around the sun once a year”。四个选项中只有as合适，其引导的非限制性定语从句位置灵活，可置于句首，也可置于句末，且as有具体的含义“正如”。故选B。

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本试题收录于：英语题库普高专升本分类