单项选择题

The way of communication ______ made use of were visible signs.

A．French
B．Roman
C．African
D．American
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单项选择题
We can infer (推断) that the plumbing ______ at that time.
A．cost little
B．was more expensive than a water system
C．was too expensive for every family to afford
D．was not necessary
单项选择题
Ambrose believes that the art of storytelling ______.
A．will be more popular than TV
B．will be popular again
C．started in Wales
D．are in the hands of some old people
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