美国nba篮球赛直播勇士:It's polite to keep ____(quietly) in the library.(用适当形式填空)

It's polite to keep ____(quietly) in the library.(用适当形式填空) She's polite and eleqant.提问 some cultures consider it polite not to take something the first time it is offered It's up to you. 翻译 It's up to you 是什么意思？ IT'S UP TO YOU It's a good place to ( ) It's first time to it's up to u !是什么意思？ it's no hard to 是什么意思？