选出适当的词填空.(30分)
（1）_________make food for us.
（2）________check our teeth.
（3）________ catch criminals.
（4）_________help us to learn.
（5）_________put out fires.
（6）__________help sick people.
选出适当的词填空.(30分)
（1）_________make food for us.
（2）________check our teeth.
（3）________ catch criminals.
（4）_________help us to learn.
（5）_________put out fires.
（6）__________help sick people.
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