---They are quiet, aren’t they?
--Yes. They are accustomed at meals.
A. to talk
B. to not talk
C. to talking
D. to not talking
网友回答
A. to talk
B. to not talk
C. to talking
(答案→)D. to not talking
解析:考查固定句型,be accustomed to doing sth意思“习惯于做某事”,其否定形式be accustomed to not doing sth,句子意思“他们不习惯在吃饭时讨论”,所以选D