单项选择题

He ______ the bushes around his house carefully with D.D.T. every evening.

A．scattered
B．spread
C．sprayed
D．distributed
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单项选择题
I must have ______ for ten minutes before the telephone operator put me through.
A．hung about
B．hung up
C．hung on
D．hung round
单项选择题
The report deals with British's industrial problem, ______ from technology gaps to lack of investment.
A．diversifying
B．ranging
C．differing
D．altermating
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