四级口语考试常用的词汇有很多，以下是一些常见的四级口语词汇：

1.Greetings and farewells: Hello, Hi, Good morning/afternoon/evening, Nice to meet you, See you later, Goodbye, etc.

2.Basic information: Name, Age, Occupation, Hometown, Nationality, etc.

3.Daily life: Eating, Sleeping, Working, Studying, Shopping, Travelling, etc.

4.Hobbies and interests: Reading, Music, Sports, Movies, TV shows, etc.

5.Education and career: School, Major, Job, Career goals, etc.

6.Society and culture: Family, Friends, Relationships, Customs,Traditions, etc.

7.Technology and the Internet: Computers, Mobile phones, Social media, Online shopping, etc.

8.Current events and hot topics: News, Politics, Economics, Environment, etc.

These are just some of the common vocabulary used in CET-4 speaking exams. It is recommended that you prepare more vocabulary in different topics to improve your speaking skills.