【单选题】Model Test 1_clip6.mp3: Questions 16 to 18 are based on the passage you've just heard. 16. What is the key to a happy marriage according to the study?
【简答题】Questions 22 to 25 based on the passage you've just heard.Answer the questions briefly. Model Test 1_clip8.mp3: 22. Why is it difficult for visitors to locate Cambridge University?