英语,用所给动词的正确形式填空.
问题描述：
英语,用所给动词的正确形式填空.
4.Listen,some beautiful birds_________________ (sing) in the tree.
5.___________you ____________ (argue) with your father when I knocked at the door?
6.I was surprised______________ (find) that Ann got mad after hearing the bad news.
答
are singing
Werearguing
to find
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