题目内容
[音频]【单选题】Section A Directions: In this section, you will hear three news reports. At the end of each news report,you will hear two or three questions. Both the news report and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Question 1and 2 are based on the news report you have just heard. Question1: What has caused the thick clouds in the photos taken by NASA satellite?
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