酒店的退房时间是中午12点。

The ___check-out time at the hotel is 12 noon.

他正在仔细检查新买的电脑是否有问题。

He is ___checking out his new computer for any issues.

她在图书馆前台办理了三本小说的借阅手续。

She is ___checking out three novels at the library counter.

在发布新产品之前，我们需要仔细检查所有功能。

Before launching the new product, we need to do a thorough ___check of all its features.