单项选择题

As long as he is given enough time, I am ______ sure he can do it well.

A．good--looking
B．beautiful
C．nice
D．pretty
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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
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
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