When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.
A. was coming B. had come
C. comes D. would come
When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.
A. was coming B. had come
C. comes D. would come
C
表示客观事实，用一般现在时。