单项选择题

When the air in a certain space is squeezed to occupy a smaller space, the air is said to be ______.

A．commenced
B．compressed
C．compromised
D．compensated
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单项选择题
He cut the string and held up the two ______ to tie the box.
A．segments
B．sediments
C．seizures
D．secretes
单项选择题
All the musical instruments in the orchestra will be ______ before it starts.
A．civilized
B．chattered
C．chambered
D．chorded
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