单项选择题

A) which C) that
B) it D) what

A．which
B．it
C．that
D．what
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单项选择题
A) process C) procedure B) experiment D) manner
A．process
B．experiment
C．procedure
D．manner
单项选择题
A) obtain C) master B) acquire D) memorize
A．obtain
B．acquire
C．master
D．memorize
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