单项选择题

Years ago, many of the machines were operated ______ but now they are operated by computers.

A．manually
B．artificially
C．automatically
D．synthetically
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单项选择题
He has suffered from this ______ disease for about a couple of years now, no effective medicine for it at the moment.
A．perpetual
B．permanent
C．chronic
D．sustained
单项选择题
New year is round the corner, every house you visit are beautifully decorated with ______.
A．ornament
B．luxury
C．complement
D．complaint
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