Of course! The following are some recommendations for original English works suitable for CET-4: 1 The Great Gatsby by F Scott Fitzgerald -This novel is regarded as a classic of American literature. It is moderate in difficulty but also full of depth and inspiration for readers with CET-4 proficiency. 2 To Kill a Mockingbird by Harper Lee -This novel is a classic in the history of American literature and a good choice for CET-4 readers. The story tells a story about racial discrimination and family relationships in the United States, but also explored human nature and morality. 3 1984 by George Orwell -This is a classic dystopian novel that is very enlightening for readers who want to understand politics and social systems. The novel tells the story of a dictatorial state and also talks about power, freedom, and humanity. 4 The Catcher in the Rye by J.D. Salinger -This novel is another classic of American literature, suitable for readers with CET-4 proficiency. The story tells the story of a young man's growth, but also explored loneliness, humanity, youth and other issues. Lord of the Flies by William Golding -This novel is another classic book about violence and human nature in the wilderness. The story tells the story of a group of children living on a deserted island, and it also explored issues such as power, freedom, and humanity. I hope these recommendations can satisfy my needs. Happy reading!