单项选择题

From ancient times, the valley of the Nile has been made______ by the river's floods.

A．fluent
B．fruitful
C．futile
D．fertile
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单项选择题
I think it is only by a______ of imagination that you say you have seen a ghost.
A．pinch
B．shortage
C．lack
D．stretch
单项选择题
The teacher______ his lessons about France with photographs of the local people.
A．reviewed
B．delivered
C．illustrated
D．analyzed
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