单项选择题

For some time now, world leaders ______ out the necessity for agreement on arms reduction.

A．had been pointing
B．have been pointing
C．were pointing
D．pointed
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单项选择题
In order to repair barns, build fences, grow crops, and care for animals a farmer must indeed be ______.
A．restless
B．skilled
C．strong
D．versatile
单项选择题
I only know the man by ______ but I have never spoken to him.
A．chance
B．heart
C．sight
D．experience
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