单项选择题

______ you ______ further problems with your printer, contact your dealer for advice.

A．If, had
B．Have, had
C．In case, had
D．Should, have
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单项选择题
I went there in 1988, and it was the only occasion when I ______ the journey in.exactly two days.
A．must make
B．could make
C．must have made
D．was able to make
单项选择题
Who said that this sweater will not ______ when washed
A．shorten
B．contract
C．withdraw
D．shrink
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