What signs can you put in the following places?
a:in your classroom
b:in a library
c:in a museum
d:in a garden
e:on a bus
人气：192 ℃ 时间：2020-07-02 02:50:22
解答
a:No speaking.
b:Be quiet.
c:No photo.
d:No picking/ Keep off the grass.
e:No smoking .
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