单项选择题

There has been an encouraging ______ to the appeal for contribution to the Famine Relief Fund.

A．reply
B．response
C．return
D．acknowledge
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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
单项选择题
Every word processor we sell comes with a two year ______.
A．assurance
B．protection
C．security
D．guarantee
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