0比一切正数都小．______．

请先阅读下面短文，掌握其大意，然后从方框中所给的词中选出最恰当的10个，用其适当形式填空，并将答案填写到答题卷的相应位置。每个词限用一次。(每小题1分)

out      for      Didn’t     where     put up      why               problem      have      don’t      with      tell       that

The students were having their chemistry (化学) class. Miss Li was    小题1:  the children what water was like. After that, she asked her students, “What’s water?” No one spoke    小题2:  a few minutes. Miss Li asked again, “Why      小题3:  you answer my question?    小题4: I tell you water is like? ”Just then a boy    小题5: his hand and said, “Miss Li, you told us    小题6: water has no color and no smell. But     小题7:to find such kind of water? The water in the river behind my house is always black and it    小题8: a bad smell.” Most of the children agreed     小题9: him. “I’m sorry, children.” Said the teacher, “Our water is getting dirtier and dirtier. That’s a    小题10:.”