用所给词的适当形式填空。1.Thehigherthemountainis,the

问题详情：

用所给词的适当形式填空。

1. The higher the mountain is, the ________ (thin) the air is.

2 . It’s a (an) ________ (usual) experience, few people have chances to do it.

3. The young man ________ (live) alone since he graduated from college.

train was very_______（ crowd）and l had to stand all the way.

5. It is so hot. Let's go_______（swim）．

【回答】

1  thinner  2 unusual  3  has lived 4  crowded 5  swimming

知识点：构词法

题型：完成句子