单项选择题

It is one thing to accuse a person of a certain crime, but ________.

A．proving it is different
B．how to give proof is no easy
C．when to prove it is difficult
D．to prove it is quite another matter
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单项选择题
________ had we started when the car got a flat tire.
A．Hardly
B．Rarely
C．No sooner
D．Nearly
单项选择题
We should respect the local ________ of the various minority nationalities.
A．routines
B．customs
C．habits
D．practice
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