单项选择题

A．He is writing a letter.
B．He is painting the house.
C．He is brooming the room.
D．He is climbing a ladder.
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单项选择题
A．averageB．commonC．sameD．difference
A．average
B．common
C．same
D．difference
单项选择题
A．goB．takeC．setD．come
A．go
B．take
C．set
D．come
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