I can't get it all done by Friday - it's just not possible.
我星期五前無法全部完成——是不可能的。
Is it possible to buy tickets in advance?
可以提前訂票嗎?
They got as far as was humanly possible (= as far as anyone could have) before turning back.
他們折返前已經盡力能走多遠就走多遠了。
Please take your seats as quickly as possible.
請儘快入座。
I'll go as soon as possible.
我會儘快走。