the fact that he was not a trained economist, his achievements were remarkable.
A. In spite of
B. In case of
C. In view
D. In favor of
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(答案→)A. In spite of
B. In case of
C. In view
D. In favor of
解析：考查介词短语。in spite of尽管，虽然；in case of如果，万一；in view被考虑；被期待；in favor of支持。根据句意：尽管他不是一位受训的经济师，他的成就是非凡的。