问题
选择题
He is known _____ a scientist and famous _____ his research on rice.
A．for; as
B．for; for
C．as; for
D．as; as
答案
答案：C
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He is known _____ a scientist and famous _____ his research on rice.
A．for; as
B．for; for
C．as; for
D．as; as
答案：C