阅读下面短文，根据文章大意用所给单词的适当形式填空（未提供单词的，限填一词），使文章意思完整、正确。
Mr. Clark works in a
middle school. He likes reading and often borrows some books {#blank#}1{#/blank#} the
library. He listens to the radio every morning and reads all kinds of {#blank#}2{#/blank#}
(newspaper) after supper. So he knows much and teaches well. His students like {#blank#}3{#/blank#}
(his) very much. Mike, Mr. Clark's little son, is only nine. He also likes
books. And he often asks his father some questions. Mr. Clark always thinks the
boy is too young {#blank#}4{#/blank#} (understand) them and chooses the easiest ones to
answer. Of course the boy is not pleased with it.
One day, Mike read
something about the lights and was {#blank#}5{#/blank#} (interest) in it. When his father
told him to do some housework, he went on thinking of it. He asked Mr. Clark a
few questions, and his father answered all. Then his father said {#blank#}6{#/blank#}
(proud), "Fathers always know more {#blank#}7{#/blank#} sons do!"
The boy thought for {#blank#}8{#/blank#}
while and said, "I don't think so."
"Oh? Why?"
Mike didn't answer but
asked a question instead, "Who {#blank#}9{#/blank#} (invent) the lights?" "Thomas
Edison." answered Mr. Clark.
"Why didn't his
father invent them?" {#blank#}10{#/blank#} (look) at his son, Mr. Clark didn't know how
to answer the question!
