* She could post her feeling on social media. She could tell it to her teacher. (or)
   * Đáp án: She could post her feeling on social media or tell it to her teacher.
   * Giải thích: "or" được sử dụng để chỉ sự lựa chọn giữa hai hành động.
 * I like school. I enjoy learning new things and spending time with my classmates. (because)
   * Đáp án: I like school because I enjoy learning new things and spending time with my classmates.
   * Giải thích: "because" được sử dụng để chỉ lý do.
 * You must get to the concert early. You won't have a seat. (otherwise)
   * Đáp án: You must get to the concert early, otherwise you won't have a seat.
   * Giải thích: "otherwise" được sử dụng để chỉ kết quả nếu điều kiện không được đáp ứng.
 * She is careful. She still forgets her phone when she goes out. (although)
   * Đáp án: Although she is careful, she still forgets her phone when she goes out.
   * Giải thích: "although" được sử dụng để chỉ sự đối lập giữa hai mệnh đề.
 * William wanted to study late at night. He drank a cup of coffee. (therefore)
   * Đáp án: William wanted to study late at night, therefore he drank a cup of coffee.
   * Giải thích: "therefore" được sử dụng để chỉ kết quả hợp logic.
 * Henry was very tired yesterday morning. He couldn't go to school. (so)
   * Đáp án: Henry was very tired yesterday morning, so he couldn't go to school.
   * Giải thích: "so" được sử dụng để chỉ kết quả.
 * Ms. Susan's lecture was long. It was too boring. (moreover)
   * Đáp án: Ms. Susan's lecture was long and moreover, it was too boring.
   * Giải thích: "moreover" được sử dụng để bổ sung thêm thông tin, nhấn mạnh ý.