这块木板非常平整，适合做桌面。

This wooden board is perfectly ___flat, ideal for a tabletop.

这部电影的表演平淡无奇，让人昏昏欲睡。

The acting in this movie was ___flat and made me sleepy.

她刚搬进了市中心的一间小公寓。

She just moved into a small ___flat in the city center.

过去两年房价一直保持平稳，没有明显涨跌。

House prices have stayed ___flat for the past two years, with no significant rise or fall.

我们不得不停下来换轮胎，因为后轮扎了。

We had to stop and change the tire because the rear one had a ___flat.