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--- 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

--- 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

--- 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

--- 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