It is polite in public piaces.a keeping your voice downb to keep _英语解答

It is polite in public piaces.
a keeping your voice down
b to keep your voice up
c keeping your voice up
d to keep your voice down

人气：132 ℃　时间：2020-02-03 15:50:48

解答

It is polite _d to keep your voice down_ in public places.
公众地方小声说话是基本礼貌.