Mario smiled. This was fun. But when he looked into the bag, he frowned. What a disappointment! A ham sandwich, but no cookies! He had to have cookies．

Mario turned in his seat. "Want to trade lunches?" he asked Juana．

"Definitely!" said Juana. She grabbed his lunch and tossed hers onto his lap．

He opened the lunch bag. Pizza! He reached into the bag to grab it. Oh, no! The pizza was hard. He could hit a home run with pizza that hard．

Mario twisted in his seat. One last try, he told himself. "Hey, Mona! Trade lunches?"

Three rows behind him, Mona seemed hesitant: Finally, she nodded. She passed her lunch forward, and he passed his back．

Mario took a deep breath and opened the bag. It was a peanut butter and jelly sandwich, an orange, and two cookies. The sandwich was a little squashed(挤压), and one of the cookies was broken.

Mario ate it anyway. And it was delicious.

21. Mario trade lunches so many times because _________________.

A. each lunch he received was dissatisfying

B. his curiosity was aroused with each trade

C. he needed something interesting to kill time

D. he preferred more food to settle his stomach

22. In the underlined sentence (Paragraph 9), the author is comparing the pizza to________.

A. left-over food B. a baseball bat

C. home-made bread D. a difficult game

23. What does the author intend to tell us？__________.

A. Friends are there when you need them．

B. You should be content with what you have．

C. If you want something done right, do it yourself．

D. There is always something better around the corner．

　　An article describing the attitude of post-1990s generations toward life has recently gone viral on Chinese social media, which resonates with(引起共鸣) millions of youngsters for reflecting their casualness and calmness under gradually increasing social pressure．

　　The article was first published on WeChat with the title of "The first group of post-90s generation who have become monks". By using the phrase "Buddha-like youngsters"(佛系青年), it claimed that some of the post-90s generations, who were born between 1990 and 1992, have "seen through the emptiness of life" and kept a casual and calm attitude toward career and life．

　　"It's fine to have something or not and there is no need to pursue or win anything," said the article， while defining "Buddha-like" people and clarifying that the phrase has nothing to do with the religion of Buddhism. An easy example is that Buddha-like youngsters do not care about taking which way to return home or choosing what to eat for lunch, according to the article．

The phrase has touched the nerves of the Chinese youngsters who are facing the fast-paced life, cut-throat world of career and great mental pressure in China, read a commentary by People's Daily on