The students have ()this grammatical rule.
The students have ()this grammatical rule.
A、grasped
B、grabbed
C、obtained
D、known
【正确答案】:A
【题目解析】:此处需要填一个及物动词,grasp掌握,领会;grab抢夺;obtain得到;know知道。根据句意:这些学生已经掌握了这个语法规则。应选A
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