25 chuyên đề ngữ pháp tiếng Anh: CD14: Bài tập cấu tạo của từ

    Chọn đáp án đúng

    1. Many astronomers never get back to the Earth because of _____ accidents.

    2. Vietnam is known as one of the _____ nations.

    3. The drug under examination has shown some _____ results when given to volunteers in some countries.

    4. There might be a _____ to cheat if students sit too close together in the exam rooms.

    5. He has been very interested in doing research on _____ since he was at high school.