题目内容：

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

优质解答

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...