1 . The intention of these adaptations is to make the classics more ______ (易懂的) to young readers. （根据汉语提示单词拼写）

2 . The remote desert area is a________ only by helicopter. （根据首字母单词拼写）

3 . It is believed that the Covid-19 will soon be defeated since the vaccine is a________.(根据首字母单词拼写)

4 . The castle is only a_____________ to the privileged and we ordinary citizens are not allowed to enter.

5 . The Forbidden City was once only a________ to the emperor, his family and senior officials.

6 . The committee recommended that the legal aid system should be ______________ (可使用的) to more people. （根据汉语提示填空）