Language Points:
20. cling v. clung (to) to hold tightly ，stick firmly 紧握（紧抱）住；牢牢粘着；缠着
She still clings to the belief that her son is alive
她仍然抱着儿子还活着的信念。 cling to 坚持，墨守
21. access n. 接近，进入，通路
a place easy (difficult) of access 易于（难以）进入的地方
the access to a building 到达（或进入）大楼的通路
give access to 接近，进入
22.range n. 变动范围，变化幅度
a country with a wide range of temperature 一个气温变化很大的国家
Several cars are available within this price range.
在这个价格范围内，有好几种汽车可供选购。
v. (+prep；not in progressive forms不用进行式)
to vary between limits; reach from one limit to another 在某范围内变化
The children’s ages range from 5 to 10 / between 5 and 10 .
这些孩子的年龄在五至十岁之间。