用方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次（每空一词）。

rain   wind   look   after   hope

Nancy: Lovely day, isn't it?

David: Yes. It's wonderful  the terrible heavy rain last night.

Nancy: Yes. The air is so fresh and the grass  so green.

David: I really  it could stay nice for the whole day.

Nancy: Well, the weather report says that we'll have occasional(偶然的)  this afternoon, and the temperature will drop to 10℃.

David: Oh, the weather changes so quickly this time of the year! What about the weekend?

Nancy: It's going to be fine and sunny, but a little .

David: That's not too bad.