—They are quiet, aren’t they?
—Yes. They are accustomed ______ at meals.
A．to talkB．to not talkC．to talkingD．to not talking
D
考查動(dòng)詞用法。句中be accustomed to doing習(xí)慣于做，根據(jù)句意用否定。句意：——他們很安靜，不是嗎？——是的，他們習(xí)慣于吃飯不講話
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