19．①Supermarkets only sell food before its"sell-by"date．So where does food past its"sell-by"date go？The answer is in the trash bin．Besides shops，people also cast away a lot of food when they buy too much and can't eat it up．To stop food waste，people have come up with great ideas．Take a look and try to join the action!
②Set up food banks．When we have extra money，we save it in banks．This idea made people think．Could they set up"banks"for food？The world's first food bank started in the US in 1967．Many other countries，including China，have caught up with this great idea．For example，Shanghai has recently made a "share fridge"．It stores cakes and canned food donated （捐贈） from nearby markets and restaurants．It's free for anyone to enjoy．
③Pay as you feel．The Real Junk Food Project is a company in the UK．It says that food past its"sell-by"date could still be OK to eat．So they collect it from supermarkets，and put it on shelves （貨架） in special cafes．There，the food has no price label （標(biāo)簽）．You can give as much money as you want．If you don't want to spend money，you can help do some work there．There are now 125Real Junk Food cafes worldwide．And the number is growing quickly．
④Buy less．When there's no food bank around，what can we do to help stop food waste？In two words：Buy less．Dining halls in more than half of US colleges are going tray-less （無托盤）．It makes it harder for students to take too much．This small change brings a big difference．It reduces food waste by 25to 30percent，and saves water and energy because there are no trays to wash．
42．The underlined words"cast away"in Paragraph 1probably meansD．
A．put away
B．take away
C．give away
D．throw away
43．Which of the following is true according to the article？B
A．People need to pay for food from"share fridge"．
B．Dining without trays helps to reduce food waste and save water．
C．Fifty percent of American restaurants are going tray-less．
D．The food in the Real Junk Food Project is free for anyone．
44．How does the writer organize the writing？A
45．What's the main purpose of the writing？B
A．To show how important the food bank is．
B．To introduce some ways of stopping food waste．
C．To ask people to buy food past its"sell-by"date．
D．To discuss where the food past its"sell-by"date goes．
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The US is a very big country．It is about 3，000miles from the east to the west，so choose carefully the places to see and the time to go．Bring a map because you may want to travel around．
