单项选择题

The discussion was so prolonged and exhausting that（）the speakers stopped for refreshments.

A．at iarge
B．at intervals
C．at ease
D．at random

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单项选择题
The car（）halfway for no reason.

A．broke off
B．broke down
C．broke up
D．broke out
单项选择题
If the profits in one year are not sufficient to pay the dividend, the（）will be paid from the profits of later year.

A．arrear
B．debt
C．difference
D．margin
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