从所给出的句子中选出合适的完成对话。

A. I can use it to water my plants. B. I'm collecting rainwater. C. Is it raining? D. It's cloudy. E. We can't go out now.

(Alice is looking out of the window.)

Mom: How is the weather, Alice?

Alice:

The wind is blowing gently.

Mom: I see. We can have an outing today.

(After breakfast)

Alice: Mom, wait a minute.

Mom: Oh, yes, it's raining heavily.

(Afew minutes later)

Mom: What are you doing, Alice?

Alice:

Mom: How can you use the rainwater?

Alice:

Mom: That's a good idea!