题目内容
【题目】When I got to school this morning, l realized I (leave) nay backpack at home.
【答案】had left
【解析】从句 When I got to school this morning是一般过去时，主句的动作发生在从句之前，表示过去的过去，用过去完成时，故填 had left。
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题目内容
【题目】When I got to school this morning, l realized I (leave) nay backpack at home.
【答案】had left
【解析】从句 When I got to school this morning是一般过去时，主句的动作发生在从句之前，表示过去的过去，用过去完成时，故填 had left。