单项选择题


What was the boy doing this time yesterday

A． Planting trees.
B． Playing football.
C． Planting flowers.
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单项选择题
When must they work out the problems
A． Tomorrow.
B． Now.
C． Next week.
单项选择题
A． how to write them B． how to write C． what to write them
A． how to write them
B． how to write
C． what to write them
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