We the old scientist his contribution the country.
A. admire；for；to
B. admire；at；to
C. respect；on；for
D. respect；on；at
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(答案→)A. admire；for；to
B. admire；at；to
C. respect；on；for
D. respect；on；at
解析：本题考查动词搭配。admire sb.for sth.因某物羡慕某人；contribution后用介词to。