单项选择题

A．up
B．due
C．necessary
D．owing
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单项选择题
A．Steven is too young to leave home.B．Steven will be homesick in school.C．Steven has to learn to be independent.D．Steven should learn how to help others.
A．Steven is too young to leave home.
B．Steven will be homesick in school.
C．Steven has to learn to be independent.
D．Steven should learn how to help others.
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