单项选择题

Classes will cease to exist by the time communism______ throughout the world.

A．is achieved
B．has been achieved
C．will be achieved
D．will have been achieved
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单项选择题
I should be the______ man to think highly of those Who wake up to persons of influence.
A．right
B．very
C．last
D．same
单项选择题
I was______ in the middle of my call because I had no more pennies to put in the box.
A．broken off
B．cut off
C．hung up
D．cut down
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