The old scientist devoted most of his time ___________ the space science.
A．developB．to developingC．to developD．developing
B
考查固定搭配。devote ...to sth./doing sth.“致力于......”。句意“那個老科學(xué)家把大部分時間都用于研究空間科學(xué)上了�！眛o是介詞，故用doing。故選B。
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