单项选择题

When a machine analyses the frequencies used by a particular voice and draws a graph of them, sound is ______ electronically into a pattern of lines.

A．relieved
B．converted
C．magnified
D．burst

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单项选择题

Because Bob had stopped reading his technical journals he was ______ of new development in his field.

A．intellectual
B．subtle
C．ignorant
D．tedious

单项选择题

His health falling, ______ in 1782.

A．so Herry Lee went on leave from the army
B．the army gave Herry Lee leave
C．when the army gave Herry Lee leave
D．Herry Lee went on leave from army

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