---They are quiet aren’t they? Yes. They are accustomed at meals. A. to talkB. to not

问题补充：

---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

答案：

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