题目内容
根据单词释义用正确的单词形式完成句子
We all live on the ________.
(land, ground)
Natural habitats are ________
(break to pieces
All the dinosaurs ________ because of the cold weather.
(go out of sight; be seen no more)
We should ________ the Earth because it is our home.
(to get some one or something out of danger)
The young man has to ________this big family.
(hold up or keep in place