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问题: 一道英语选择题

He raised his gun,pointed it to a deer and______aim,,shot at it.
Atook careful
Btaking careful
Cto take careful
Dtaken careful
正确答案及原由

解答:

是B,and连接的三个动词是raised,pointed,and shot。插在and与shot中间的动作只能用ing形式来表示伴随状态,做状语。