Did they have a picnic in the part last saturday do you know?该成用IF或whether引导的句子

Did they have a picnic in the part last saturday do you know?该成用IF或whether引导的句子

题目
Did they have a picnic in the part last saturday do you know?该成用IF或whether引导的句子
答案
1.答案是Do you know if they had a picnic in the party last saturday? 或者Do you know whether they had a picnic in the party last saturday? 2.解释:Do you know .是主句,if/whether引导的宾语从句做know的...
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