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:考查情景交际和固定搭配。“他们很安静,不是吗?”“是的。他们习惯了在吃饭时保持安静。”be accustomed to doing sth.“习惯于做某事”,排除A、B;C“习惯于说话”,与句意不符。动名词的否定是在动名词前加not。故选D。