我的行李箱拉链坏了，我拉不上它。

I can't ___zip my suitcase because the zipper is broken.

快递员飞快地穿过街道送包裹。

The courier ___zipped through the streets to deliver the package.

你可以把照片压缩成zip格式再发送。

You can compress the photos into a ___zip format before sending them.

我翻遍了整个房间，但关于那封信的下落还是一无所获。

I searched the whole room but found ___nothing about where the letter went.