单项选择题

Foreign language teaching is ______ art as well as ______ science.

A．the; the
B．an; a
C．an; 不填
D．the; 不填
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单项选择题
The boy has four appels: two yellow ______ and two red
A．one; one
B．one; ones
C．ones; other
D．ones; ones
单项选择题
Won't you let ______ help you
A．I and my friend
B．my friend and I
C．my friend and me
D．my friend and I to
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