单项选择题

These continual （）in temperature make it impossible to decide what to wear.

A．transitions
B．transformations
C．exchanges
D．fluctuations

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单项选择题
In mountainous regions, much of the snow that falls is （）into ice.

A．dispersed
B．embodied
C．compiled
D．compacted
单项选择题
The boxer （）and almost fell when his opponent hit him.

A．staggered
B．shattered
C．scattered
D．stamped
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