单项选择题

A．water
B．air
C．sunlight
D．food
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单项选择题
A．afterB．atC．throughD．on
A．after
B．at
C．through
D．on
单项选择题
How long does it take Wang Hua to be good at typing
A． One month.
B． More than one month.
C． Two months.
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