单项选择题


A．dead
B．interesting
C．gone
D．crazy
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单项选择题
A．beganB．listenedC．feltD．sounded
A．began
B．listened
C．felt
D．sounded
单项选择题
Vacuum packing is to ______.
A．immerse food in very hot or boiling water
B．sterilize food
C．remove air from the cans
D．subject food to steam or boiling water
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