第53页

信息发布者：
has
must
mustn't
angry
eat
tidy
at
in
road
must
must
lights
green
man
do
have
meat
vegetables
about
healthy
diet
We must keep our desk clean and tidy. We mustn't run in the classroom.
We must listen to our teachers carefully. We mustn't shout in class.
must listen to teachers carefully
never goes to school late
mustn't eat or drink in class
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