单项选择题

The meeting was so prolonged and exhausting that______ the speakers stopped for refreshments.

A．at ease
B．at random
C．at intervals
D．at large
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单项选择题
A．matingB．excitingC．warningD．boring
A．mating
B．exciting
C．warning
D．boring
单项选择题
After a meal in a restaurant, you ask the waiter for the______.
A．bill
B．note
C．receipt
D．menu
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