这座城市的商业特权是由国王颁发的特许状授予的。

The city's commercial rights were granted by the king's ___charter.

学校租了一辆大巴车送学生去郊游。

The school ___chartered a bus for the students' field trip.

我们签订了租用这辆巴士的合同，为期三天。

We signed a ___charter for this bus for three days.