【题目】He helped his mother yesterday.(对画线部分提问)
_______ _______ he help his mother?
【答案】When did
【解析】
略
上一篇 一个数除以6,商是20,余数最大是(_),当余数最大时,被除数是(_)...
下一篇 She watched TV last night.(对画线部分提问)...
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