题目内容

—They are quiet,aren't they?
—Yes.They are accustomed ________ at meals.
A.to talkB.to not talk
C.to talkingD.to not talking
D
词组“be accused to (习惯于)”,其中“to”是介词,后跟名词或动名词。动名词的否定式在其前加“not”。
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