单项选择题

The shutdown of the machine was due to its________ parts.

A．decayed
B．detective
C．deficient
D．spoiled
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单项选择题
He didn't openly show his dislike of what the sergeant had done. He just sounded________.
A．with cold and short and pleasant
B．in cold and short and pleasant voice
C．cold and short and pleasant words
D．cold and short and pleasant
单项选择题
Young as he is, he is fairly________.
A．practicable
B．permanent
C．portable
D．practical
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