他的英语水平已经达到了高级阶段。

His English ___level has reached an advanced stage.

在铺地板之前，我们需要确保地面是完全平整的。

We need to make sure the ground is ___level before laying the floor.

工人们需要先把地面整平才能铺新草坪。

The workers need to ___level the ground before laying the new lawn.

健身房在商场的二楼。

The gym is on the second ___level of the shopping mall.

用水平仪检查一下桌子是否放平了。

Use a ___level to check if the table is flat.