In this section, you will hear a passage. At the end of the passage, you will hear three questions. Both the passage and the questions will be spoken only once. After you hear each question, you must choose the best answer from the four choices marked A), B), C) and D).A、They can use big data freely.
B、The personalized courses can suit their needs.
C、They don’t have to worry about teachers’ teaching skills.
D、They don’t need teachers anymore.