单项选择题

What advice is given for printing the signs according to the last paragraph（）

A．Colored signs are preferred.
B．Bold letters should be used.
C．Large pictures should be included.
D．Phone numbers should be provided.

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单项选择题
Why should signs be posted in a community center（）

A．Schools are nearby.
B．There are many stores.
C．udents often meet there.
D．More people gather there.
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