单项选择题

The glass vessels should be handled most carefully since they are______

A．crisp
B．intricate
C．subtle
D．fragile
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单项选择题
This new laser printer is______ with all the leading software.
A．competitive
B．cooperative
C．compatible
D．comparable
单项选择题
The article suggests that when a person______ under unusual stress he should be especially careful to have a well-balanced diet.
A．is
B．were
C．be
D．was
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