单项选择题

The discussion was so prolonged and exhausting that______we had to stop for refreshments.

A．at large
B．at ease
C．at random
D．at intervals
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单项选择题
Russian women had to wear protective masks as they walked in Moscow, which was ______by a heavy smog yesterday.
A．shrouded
B．unveiled
C．decayed
D．deprived
单项选择题
A luxury express train jumped the tracks on a bridge in eastern India, killing at least 50 on the spot. According to the Northern Railway spokesman, the death______is expected to rise.
A．figure
B．toll
C．span
D．yield
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