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She dressed smartly (because she wanted to make a good impression)就括号部分提问.答案为什么是Why did而不是why was?

题目详情
She dressed smartly (because she wanted to make a good impression)就括号部分提问.
答案为什么是Why did而不是why was?
▼优质解答
答案和解析
没有be动词~有dressed需用did