单项选择题

With the development of production and science, radio ______ a wide application in a short time.

A. found
B. has found
C. finds
D. has founded
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单项选择题
A. Because I liked to have a walk. B. Because my mother felt sick.C. Because I went to the party alone. D. Because the party was very interesting.
A. Because I liked to have a walk.
B. Because my mother felt sick.
C. Because I went to the party alone.
D. Because the party was very interesting.
单项选择题
What he has just said has little to do with the question ______ discussion.
A. on
B. under
C. in
D. at
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