单项选择题

To communicate __________，both the content and the form.of the message mustbe clear.（）

A．ordinarily
B．pleasantly
C．relevantly
D．effectively

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单项选择题

A．Nothing up.
B．Nothing new.
C．Everything’s OK.
D．Everything’s the same.

未分类题

Many Mayan cities and temples__________ .A． were constructed by the priestsB． were built with heavy stonesC． were rebuilt several timesD． were the miracles of god