They were playing volleyball on the beach when it began to rain ____ (sudden).
小明家和学校相距1240米．小明从学校往家走，每分走75米，妈妈从家往学校走，每分走80米，多长时间他们能相遇？
以下海洋中属于我国内海的是（ ）
- What colour is the light. -It is red. Let's stop.
