Questions 11 to 14 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. How were the police able to prove that Joe had robbed the bankA．The raid had been photographed by hidden cameras. B．Some watchman had seen the raiD、 C．The bank teller proved that Joe was the robber. D．Some monitors had been installed nearby.
试题查看
参考答案： 
答案解析