单项选择题

In recent years special attention has been paid developing the students’ productive skills.

A. over
B. to
C. on
D. in
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单项选择题
A thirty-minute-call anywhere in the United States costs than a dollar when you dial it yourself.
A. least
B. less
C. few
D. little
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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