①Cl₂+H₂O  ②NO₂+H₂O   ③Na₂O₂+H₂O   ④NH₃+H₂O．

用恰当的颜色描述下列事物，至少写出5个完整的句子
提示词： sky , bananas , apple , trees , exercise book.
1 ____ 
2____ 
3 ____ 
4 ____ 
5____

    It was Children's Day yesterday, we 1the park. Our teacher was 2us.

    3 many people there. Some Young Pioneers (少先队员)4 near the river.

    5 sang and danced. There were some6 on the river. There was a hill

    7. Some boys8 in the river. We sat under 9 apple tree with our teacher. We 10on Children's Day yesterday.

读下图，回答下题

— Your coffee smells ______.
— It's from the USA. Would you like ______ ?