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
International ______ should be reduced when this agreement is signed.
A．pressure
B．nervousness
C．tension
D．strain
单项选择题
The tone of the man is that of_______.
A．surprise.
B．sarcasm.
C．disappointment.
D．humour.
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