我坐公交车去学校大约需要十五分钟。

It takes me about fifteen ___minutes to get to school by bus.

乘车去市中心是一段三十分钟的旅程。

The bus ride to the city center is a thirty-___minute trip.

请稍等一分钟，我马上回来。

Please wait a ___minute, I'll be right back.