Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. Which of the following is NOT true, according to the passage you have just heard
A．Hamburger is very popular in America. B．Hamburger was very popular in America. C．Hamburger was not very popular in America. D．Hamburger has been very popular in America.