单选题 When I was a teenager, I ______ a lot and people couldn't understand what I was saying.
A. complained B. mumbled C. uttered D. gossiped

【正确答案】 B
【答案解析】[考点] 词义辨析
[解析] 根据people couldn't understand what I was saying可知我说话不清楚，选mumble，含糊地说话。