单项选择题
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A.Examine whether these children were healthy.
B.Find out whether their mothers had smoked.
C.Find why these children suffered breathing problems and lung disease.
D.Look into the effect that mother’s smoking had on their children.
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单项选择题
A.Watch the soccer championship with the man.B.Change the channel immediately for the man.C.Continue watching the nature program.D.Switch to see whether the nature program ended.
A.Watch the soccer championship with the man.
B.Change the channel immediately for the man.
C.Continue watching the nature program.
D.Switch to see whether the nature program ended.
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单项选择题
A.The man should stop by the bookstore on the way to Class.B.The man can return the books he doesn’t need.C.The man should have bought his books earlier.D.The man won’t need books on the first day of class.
A.The man should stop by the bookstore on the way to Class.
B.The man can return the books he doesn’t need.
C.The man should have bought his books earlier.
D.The man won’t need books on the first day of class.
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