最好把之后发生的事情掩盖起来。 Why do we use 起来 here?

Hi, what's the difference? 我知道昨天化学系和历史系的队举行了 一场篮球比赛。/…的队举行篮球比赛 了。谁赢了？化学系赢了, 68比56。

Until all suitable candidates have been interviewed no decision will be made about any future appointment. Why do we use Present perfect here (have been interviewed)? Can't I say "until candidates were interviewed..."?

下课以后我有时候跟女朋友一起去看电影。

你能借我一本大的汉俄词典吗？我要查另一个词。 Why use 一本？ Is there any difference if I say 你能借我大的...？

What's the difference between 汉语杂志 and 中文杂志？ And how do you say "magazine in Chinese"?

请帮帮我🙏