-----They are quiet, aren’ t they?
-----No. 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
(答案→)C. to talking
D. to not talking
解析：考查固定词组。固定词组：be accustomed to sth/doing sth习惯某事/做某事；句意:—他们很安静，不是吗？—不。他们已经习惯了在吃饭的时候说话。故C正确。