问题描述：
1.david is going to watch a race with his dad(改为否定句)
2.i'm going to havr a picnic tommorrow(改为一般疑问句) 3.they are going to—（take）part in a sports meeting tomorrow(用适当形式填空)
2.i'm going to havr a picnic tommorrow(改为一般疑问句) 3.they are going to—（take）part in a sports meeting tomorrow(用适当形式填空)
问题解答：
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