单项选择题

These programmes are of immense value to old people．

A．natural
B．fatal
C．tiny
D．enormous
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These are their motives for doing it
A．reasons
B．excuses
C．answers
D．plans
单项选择题
The river widens considerably as it begins to turn west
A．twists
B．stretches
C．broadens
D．bends
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