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信息发布者：
B
A
Yes, they do.
Yes, they are.
It means we must stop.
Because some elephants are crossing the road.
so
many
cars
road
How
get
to
shopping
aren't
any
lights
must
pavement
look
out
aunt
take
get
road
light
means
must
crossing
road
                                                               Classroom rules
          When we are in the classroom, we must listen to the teachers carefully. We must 
raise our hands if we have any questions. We must look at the blackboard. We must keep
our classroom clean and tidy. We mustn't sleep in class. We must be polite to our teachers.




you
can
you
can't
you
must
you
can't
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