吃透英语课本，提升在校竞争力
v. 是；在；“are”的过去式
There were many trees, and there were many clean rivers.
那里有许多树，有许多干净的河流。
They were very tired.
它们很累。
The children were safe!
孩子们安全了！
The rabbits were angry.
兔子们很生气。
They were very excited.
他们非常兴奋。
