我们必须爬上一个陡峭的斜坡才能到达山顶。

We had to climb a steep ___slope to reach the summit.

滑雪斜坡上覆盖着新雪。

The ski ___slope was covered with fresh snow.

白天，我们去斜坡滑雪。

During the day, we went to the ___slopes to ski.