往前走两个街区就能看到邮局。

Walk two blocks ___ahead and you'll see the post office.

我们提前一个月预订了餐厅。

We made the restaurant reservation a month ___ahead.

她在比赛中遥遥领先，比其他选手快了整整一圈。

She is ___ahead in the race by a full lap compared to other runners.

我们应该提前预定酒店，以免到时候没房间。

We should book the hotel ___ahead to avoid no rooms being available later.