第四部分：单词拼写、短文改错与写作（共三节，满分45分）.
第一节：单词拼写。（共10小题；每小题1分，满分10分）
76. The mother was very glad at her son’s _____(到达).
77. We are interested in the weather because it _____(影响) us so directly.
78. I’m sorry to tell you that there is no known _____(疗法) for AIDS.
