—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 |
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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 |
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