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
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单项选择题
After final examination, college students who have left their homes for a long time look forward to ______ as soon as possible.
A．be going home
B．go home
C．be gone
D．going home
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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