她邀请了很多参加派对的人，但一半的人没有出现。

She invited a lot of people to the party but ___half of them didn't show up.

我甚至一半时间都不知道她在哪里。

I don't even know where she is ___half of the time.

首先，如果电脑没有被发明，我就不会花半天时间在它前面！

First of all, if the computer hadn't been invented, I wouldn't spend ___half of the day in front of it!