After listening to the teacher’s explanations, John what he had done was wrong.
A. was aware that
B. was being aware that
C. was nervous about
D. had been nervous about
网友回答
(答案→)A. was aware that
B. was being aware that
C. was nervous about
D. had been nervous about
解析：考查形容词短语be aware that意识到，that引导的是宾语从句，be nervous about对…担心，about后面接宾语，句意：听完老师的解释，约翰意识到自己做的事情是错的。选A。