Why are young persons'ideas is important？ Because ______.
A. they are college students
B. they have strong opinions about right and wrong
C. many of them will soon be in charge of the country
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After we read the passage, we know that in America ______.
A. there is some thing different between older people and young people's opinons
B. young people are satisfied with the lives of their parents
C. there is no trouble in families at all
Some birds can make several different sounds, each with meaning ______.
A. the same
B. two
C. different
Each animal owns ______.
A. sound
B. home
C. language
A rabbit can tell others something by ______.
A. making sounds
B. dancing
C. making its tail up and down
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