我怀疑出了问题，因为我注意到她的窗帘在午餐时间仍然关着。

I suspected something was wrong when I noticed her curtains were still ___shut at lunchtime.

这家商店通常晚上9点关门。

The shop is usually ___shut by 9 PM.

请确保在你离开前大门是关着的。

Please make sure the gate is ___shut before you leave.