单项选择题
A.On short trips.
B.On long trips.
C.When flying over cities.
D.When flying at high altitudes.
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单项选择题
A.She is poor in school grade.B.Her major is thought to be useless.C.Her job expectation is too high.D.There is now an economic recession.
A.She is poor in school grade.
B.Her major is thought to be useless.
C.Her job expectation is too high.
D.There is now an economic recession.
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单项选择题
A.To make children grow tall and strong.B.To keep the soul in the body.C.To prevent someone from saying evil things.D.To protect someone against catching a cold.
A.To make children grow tall and strong.
B.To keep the soul in the body.
C.To prevent someone from saying evil things.
D.To protect someone against catching a cold.
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