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选词填空:选择方框里的单词或词组并用其恰当形式填空,使句子完整,句意通顺。 astronaut  &

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选词填空:选择方框里的单词或词组并用其恰当形式填空,使句子完整,句意通顺。
astronaut     prevent      proper       be made of        cloth

1. — Put that bag in its _____ place, and we can find it easily next time.
     — Oh, I will do it at once.
2. — What a special bridge it is!
    — Yes. It ________ lots of huge stones.
3. — Why do we use a ________ bag to go shopping?
    — Because it can reduce pollution.
4. — How many _____ were there in Shen Zhou Ⅶ? 
    — Three.
5. — Why should we plant more trees?
    — Because the trees can _____water from washing the earth away.

1. proper 2.  is made of 3. cloth 4. astronauts 5. prevent