None of us was good at swimming, so the crossing of this dangerous river was really a_________.

I have been to many countries, but none of them _________ this one.

We looked forward to _______ at eight in the morning, but he didn’t turn _______ until 9 o’clock..

(2013·东北三校一模)The police managed to gain ________ through an upstairs window.

(2013·吉林市高三二模)—May I ask for leave tomorrow?—No, you can't. ________ applying for the scholarship must be present.