Luckily, more and more people in China are __________ to keep their_______ down in public.
| A．polite enough; voice | B．enough polite; voice |
| C．too polite; sound | D．too polite; noise |
Luckily, more and more people in China are __________ to keep their_______ down in public.
| A．polite enough; voice | B．enough polite; voice |
| C．too polite; sound | D．too polite; noise |
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