There are animals that live on all seven ______. 所有七个______上都生活着动物。

Climbing tall mountains can be _____ if you are not careful. 攀登高山如果不小心可能会非常危险。

We saw a _____ waterfall on our trip to the mountains. 我们在去山上的旅途中看到了一个_____的瀑布。

He spins the _____ to find where Africa is. 他旋转着_____来找出非洲的位置。

Sunscreen helps ____ your skin from the sun. 防晒霜帮助保护你的皮肤免受阳光的伤害。

The ____ studied plants to learn how they grow. ______研究植物以了解它们是如何生长的。