We checked in at the hotel at 3 o'clock.

We checked in as soon as we arrived at the hotel.

Please check in at the reception.

Could you please petition him about this matter?

Please, pass me that book.

In the library, please refrain from speaking loudly. Thank you for your cooperation.

The windshield has cracked.

Working in the front office is very busy.

He is known as the frontman of the band.

Regarding this matter, I kindly request your prompt attention.