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)。
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by sound
somewhere he save
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A:
This is something I've never seen. What is it used for?
B:
It's used for {#blank#}1{#/blank#} water. It helps my family use only half as much water as
we used to.
A:
Wow, that's great! Where can I buy one?
B:
You can't get one {#blank#}2{#/blank#}. Because my father invented it {#blank#}3{#/blank#}.
A:
Really? Your father must be very creative then.
B:
Yes. And he believes that water is important. He says we should do something to
save water. How do you save water?
A:
Well, I save water {#blank#}4{#/blank#} using shower water to clean the toilet.
B:
That {#blank#}5{#/blank#} good. I think I'll do the same thing as you later.
