7．
Qi Haoran，a Junior 1student at High School Attached to Harbin Institute of Technology，was quite busy over the past winter vacation-and not just with homework．Qi，together with 10other classmates made a volunteer group to call on people to join the Clean Your Plate Campaign（光盘行动）．
The 11students went to many restaurants and told people the importance of saving food．"Excuse me．Do you know that 950million people around the world still haven't got enough to eat？Could you please not waste food？"They would say this kind of thing hundreds of times every day．
China in recent years has experienced serious problems with wasted food．CCTV reported in January that the food Chinese people waste every year is enough to feed 200million people for a year．
It's a tradition that Chinese people offer lots of food when they invite others to dinner．Many even feel that they will lose face if their guests have eaten all their food．
Luckily the campaign has got the support of many．In a restaurant in Xinjiang，the owner gives the guests who have eaten all that they ordered a sticker（贴花）．People can enjoy a free meal when they have 10stickers．More than 750 restaurants in Beijing have begun to offer smaller dishes and encourage their guests to take leftovers（剩饭剩菜） home．
Wasting food is a serious problem around the world，not only in China．It's said that 2billion tons（吨） of food ends up as waste every year．This is as much as half of all the food in the world．The UN Environment Program and the Food and Agriculture Organization held a"Think，Eat，Save"program on January 24to help reduce（减少） food waste．
To reduce food waste is a big task，and it needs time．It's important that everyone does their bit，just like Qi．Did you finish your meals today？
81．What did Qi Haoran and some of his classmates do in the past winter vacation？C
A．They only did their homework．
B．They joined a chess club．
C．They volunteered for a campaign．
D．They opened a restaurant together．
82．The Clean Your Plate Campaign calls on people toC．
A．do volunteer work
B．work part time in restaurants
C．stop wasting food
D．wash their plates after dinner
83．From Paragraph 4and Paragraph 5，we learn thatA．
A．wasting food is a serious problem in China
B．Chinese people waste the most food in January
C.200million Chinese people invite others to dinner every day
D．Chinese people usually don't offer enough food to their guests
84．What did the restaurant in Xinjiang do to support the campaign？B
A．The owner would have dinner with those who had eaten up their food．
B．It offered a free meal to the guests who had finished all their food ten times．
C．It gave stickers to the guests who ordered small dishes．
D．It encouraged customers to take leftovers home．
85．According to the passage，which of the following is NOT true？D
A．Many people in China are starting to do something to reduce food waste．
B．Two billion tons of food is wasted in the world every year．
C．It's not easy for people to solve the problem of wasting food．
D．The"Think，Eat，Save"program was held to make sure people eat healthy food．
根据短文内容，选择正确的答案．