单项选择题

LOGO is ______.

A．an educational testing program
B．a computer language
C．an information dispenser
D．an unreal world
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单项选择题
Were it not for their support and help, we ______ able to finish the task ahead of time.
A．were not
B．should not have been
C．are not
D．would not be
单项选择题
The old man is in the habit of going for a walk along the river every morning except ______ it rains.
A．when
B．for
C．that
D．/
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