单项选择题

I'm sure he is up to the job ______ he would give his mind to it.

A．if only
B．in case
C．until
D．unless
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单项选择题
Remember that customers don't ______ about prices in that city.
A．debate
B．consult
C．dispute
D．bargain
单项选择题
The monopoly-capitalist group ______ many smaller enterprises last year.
A．integrated
B．merged
C．combined
D．collected
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