trousers用this还是these

these trousers 是对的.

还可以说：this pair of trousers

相关介绍

According to the color, I would say that this jacket belongs to those trousers.

按颜色来说呢，我觉得这件夹克和那条裤子很配。

I threw those trousers out years ago.

几年前我就把那些裤子扔掉了。

I bought this pair of trousers two days ago.

我两天前买了这条裤子。

This pair of trousers doesn't fit me.

这条裤子我穿不合适。