题目内容
3．Mary stood still in front of a mirror，_______ on her mouth．（ ）| A． | her eyes fixed | B． | and her eyes fixed | ||
| C． | and her eyes fixing | D． | her eyes fixing |
分析 Mary站在镜子前一动不动，眼睛盯着她（自己）的嘴唇．
解答 答案：A
题干中前后句子之间有逗号分隔，如果有and连接，说明是并列句，后面的句子必须是完整的主谓结构，B，C错误；fix one's eyes on sth盯着某物；eyes与fixed之间是动宾关系，要用表示被动的过去分词．故选A．
点评 本题考查的是独立主格结构．独立主格结构是由名词（代词）+现在分词（过去分词；形容词；副词；不定式；名词；介词短语）构成．
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