单项选择题

I can't go to Mexico this year but I'll go ______.

A．by and by
B．hand in hand
C．step by step
D．little by little
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单项选择题
41（）

A．under
B．below
C．over
D．above
单项选择题
What does they in the sentence They are more concerned with the present and the future refer to（）

A．The young people.
B．The old people.
C．The young and the old people.
D．The parents.
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