单项选择题

It was ______ great shock to the world that two airplanes crashed into ______ World Trade Center in New York on September 11, 2001.

A．a; /
B．the; the
C．a; the
D．/; the
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单项选择题
--Dear me! I've been in America for a month. -- ______ you are settled, why don't you take up some serious study
A．If
B．Now that
C．When
D．Even if
单项选择题
Radio Star, ______ by the English Department, is very popular with the students.
A．built
B．founded
C．kept
D．found
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