"Clear your plate.Say no to waste." "Do not waste a grain of food." In the cafeterias of schools and companies across China，banners（橫幅） like these have been put up everywhere.They are part of a nationwide campaign（活動） to cut down on food waste in China.
   Food waste has become a big problem these days.According to the United Nations，1.3 billion tons of food is wasted every year—that's about a third of the world's total food.In China alone，the restaurants wasted 17 to 18 million tons of food a year from 2013 to 2015.That could feed 30 to 50 million people for a whole year，according to Chinese Academy of Sciences.
   To promote（推廣） the campaign，restaurants and catering associations in more than 18 provinces in China have all made guidelines to control food waste.
   In Shanxi province，for example，restaurants have been asked to serve half portions to avoid waste.The Wuhan Catering Association suggested that restaurants try the "N-1 mode".For example，a group of 10 diners should only order enough for nine people at first.More food is only brought to the table if required.If people can't finish their meals，they are also encouraged to take the leftovers（剩菜） home.
   A related online campaign has been launched on Sina Weibo.Users share photos or videos of empty plates after finishing their meals.Lots of celebrities（名人） have joined in and asked their fans to develop the habit of saving food.On WeChat，a mini-program called "Clear Plate" invites people to exchange pictures of their empty plates for credit points.People can use the credit to buy things or donate food to children in poor areas.
   "We hope our efforts can start a new trend among the younger generation，encouraging them to carry out the virtue（美德） of cherishing food and developing the habit of thrift，" said Liu Jichen，developer of the mini-program.

（1）According to the "N-1 mode"，diners in a restaurant

D

D

.
A．can order half-portioned dishes
B．have to take their leftovers home
C．should order food enough for each person
D．order dishes as if there were one fewer person
（2）What is the fifth paragraph mainly about？

C

C

A．How celebrities encourage their fans to save food.
B．Ways to develop the habit of saving food.
C．Food saving campaigns on social media.
D．Why online campaigns are necessary.
（3）What does the underlined word "thrift" in the last paragraph mean？

B

B

A．Eating at home.
B．No wasting things.
C．Sharing with others.
D．Getting credit points.
（4）What is the writer's purpose of writing the passage？

A

A

A．To ask people to avoid wasting food.
B．To make people cook more at home.
C．To encourage people take leftovers home.
D．To bring up a plan to make people eat their vegetables.