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
Trade ______ for a country to exchange its surplus goods for some services abroad.
A．makes possible
B．takes it possible
C．get it possible
D．makes it possible
单项选择题
The newly built sports ground has a ______ of 60,000 people.
A．capability
B．capacity
C．advantage
D．seat
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