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] 题干：仔细思考我为什么没有足够的时间完成学校作业之后，我意识到，我看了太长时间的电视。本题貌似考查词汇，实则在考句子语义。doubtful“怀疑的”，worried“焦虑的”，puzzled“疑惑的”，aware“有意识的”。根据题意，D为正确选项，搭配也正确。worried后面要跟上about才合理。