单选题
After thinking hard about why I did not have enough time for my schoolwork. I became _______ that I watched too much TV.
【正确答案】
D
【答案解析】[解析]句意为:苦苦想了我为什么没有足够的时间做家庭作业之后,我意识到自己看电视太多了。各项的意思是:doubtful“可疑的”;worried“担心的”;puzzled“迷惑的”;aware“意识的,知道的”。根据句意可知,答案是D。