单项选择题

A．Some flowers.
B．A radio.
C．A song.
D．A program.
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填空题
The ______ (possible) of man’s walking on the moon has been proved.
单项选择题
A．More than one year.B．More than two years.C．Three years.D．Four years.
A．More than one year.
B．More than two years.
C．Three years.
D．Four years.
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