When he was alive, the old scientist used to say that knowledge from practice and he gain
When he was alive, the old scientist used to say that knowledge from practice and he gain
发布时间：2020-08-15 00:35:44
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 ing B. had e C. es D. would e
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A. was ing B. had e (答案→)C. es D. would e 解析：表示客观事实，用一般现在时。