单项选择题

Many incurable diseases such as cancer and prostatitis become commoner ______ we get older.

A．if
B．as
C．for
D．before
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单项选择题
We couldn't use the vending machine because it ______.
A．was being repaired
B．had been repaired
C．was repairing
D．was repaired
单项选择题
-- Speak ______, please, because I can't hear a word from the back.-- Well, its ______ enough.
A．loudly ... loudly
B．louder ... loud
C．loud... louder
D．more loud ... too loud
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