1. 阅读下列短文，从下面每小题所给的A、B、C、D四个选项中选出最佳选项。

Taking pictures of an empty plate is becoming popular in the canteens（食堂）at Shenzhen University（SZU）, a report by Shenzhen Economic Daily showed.

According to the Daily, Tencent is now working with SZU to introduce AI technology to a campaign on WeChat to encourage "clear your plate". The campaign is to reduce food waste and encourage students to save food.

After finishing a meal, students can take photos of their plates and send them to the AI system. Once their photos are accepted, students can get a reward. Tencent's AI Lab provides technological support for the campaign. It takes only 40 milliseconds for the system to check a photo.

A total of 20,000 students at SZU took part in the second phase of the campaign on Monday and Tuesday. And the food waste has dropped greatly after the campaign was started.

"By using AI technology to encourage the 'clear your plate' campaign, our university can have a better understanding of students — main role in the campaign so as to carry out a rewarding system for keeping students interested in it," said Xu Xiaoling from SZU's student department.

The service has also been used in other universities in China, including Shanghai Jiao Tong University, China Academy of Art in Zhejiang Province and Jishou University in Hunan Province, attracting over 100,000 students so far.

1. （1） What is the purpose of the campaign?

   A . To protect the environment. B . To develop the traditional culture. C . To reduce food waste among students. D . To improve the safety in the university.
3. （2） What can we know from the underlined sentence?

   A . No food was wasted any more. B . More food was dropped than before. C . The campaign has made a big difference. D . There is no difference in the food waste.
5. （3） What does the word "it" refer to in Paragraph 5?

   A . The campaign. B . The AI technology. C . The university. D . The student department.
7. （4） How many universities have taken part in the campaign so far?

   A . One. B . Two. C . Three. D . Four.
9. （5） What is the best title of the passage?

   A . The Importance of Saving Food B . How AI Helps with Food Safety C . The Development of AI in Shenzhen D . How AI Helps with the Food Waste