Section B: Understanding passagesDirections: Now you will hear a passage. At the end of the passage, you will hear some questions. After you hear a question, choose the best answer from the four choices. The following questions are based on what you have just heard.[音频]1.
A) Google would start to test its self-driving cars.
B) Google self-driving cars caused only one accident.
C) Google self-driving cars drove one million miles in one year.
D) Google self-driving cars hadn't been involved in any accidents.