单项选择题

English serves as a common tongue in countries ______ people speak many different languages.

A. which
B. why
C. where
D. that
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单项选择题
The locals, all of whose homes ______ by the flood, received help from the Red Cross.
A. damaged
B. had been damaged
C. damaging
D. to damage
单项选择题
When people get unemployed, what is often worse than lack of wages is ______.
A. poverty
B. laziness
C. idleness
D. inability
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