—They are quiet, aren't they?
—Yes. They are accustomed __________ at meals.
| A．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．talk | B．to not talk |
| C．to talking | D．to not talking |
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