What is the principal explaining?

Now you will hear longer talks or conversations. Each talk or conversation will be followed by three or more questions. Choose the best answer to each question and mark the letter of the correct answer on your answer sheet. You will hear each talks or conversation only on time.

1. What is the principal explaining?

Để tiếp tục học, xin mời đăng nhập hoặc đăng ký tài khoản.

What is the principal explaining?