孩子们围着老师坐成一圈。

The children sat in a ___ring around the teacher.

马戏团表演者跳过了火圈。

The circus performer leaped through the ___ring of fire.

她把钥匙穿在挂在腰带上的钥匙环上。

She wore a key on a ___ring attached to her belt.