单项选择题

The designer himself is not sure whether this software is appropriate（）children under 12 years old.

A. with
B. in
C. for
D. of

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单项选择题

Mr. Yang,（）for his famous invention, was invited to give a lecture in the technical university.

A. was known
B. knowing
C. was knowing
D. known

单项选择题

The population of India is much larger than（）of Sweden.

A. that
B. such
C. what
D. so

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