D

Picture the scene：It's midnight．You're very hungry after studying for a long time．Then you

see a nice pie in the fridge．Do you eat it？It seems that you shouldn't，for many reasons，including its influence on your studies．

Scientists have long known that eating late at night can make us gain weight．But now a new

study has shown that late﹣night eating can also have a bad influence on our brains﹣it might hurt

our ability to learn new things and store memories．

"We believe that late﹣night eating may affect （影响） our learning by affecting the parts of the

brain that control learning and memory，"Dawn Loh，PhD，a project scientist at the University of

California，Los Angeles，said，"We believe the timing of when we eat is the main cause of the

damaged （受损的） memory．"

For the study，the researchers looked at mice with strict feeding plans．For two weeks，the

mice were either allowed to eat during the time when they are usually the most active，or during

the time when they usually sleep．The mice received the same amount（数量） of sleep and calories．

Then the researchers tested the brains of the mice．In one test，the researchers tried to find out

whether the mice could remember that a room was connected to an electric shock（电击） after 24

hours had gone by．

The researchers noticed that，when the mice were put in the room again，those mice that ate

when they should have been sleeping were less likely（可能的） to get scared than those mice that

ate during usual hours．It means that they didn't remember．

So think twice before the midnight snack﹣it might be bad for more than your weight．

42．What does the underlined word"it"in Paragraph 2refer to（指代）？　　

A．Studying for long．B．A nice pie．C．A new study．D．Late﹣night eating．

43．For the study，the researchers need　　．

A．to check the brains of the mice before the test started

B．to feed the mice only during the time when they usually sleep

C．to keep the mice in a room with an electric shock all the time

D．to let the mice receive the same amount of sleep and calories

44．According to the passage，which of the following sentences is TRUE？　　

A．A recent study shows late eating affects weight．

B．What we eat can affect learning and memory．

C．The mice that ate during sleeping hours didn't remember．

D．The mice that ate during usual hours didn't remember．

45．Which of the following could be the best title of the passage？　　

A．Eating snacks affects memory    B．Late eating hurts brain

C．Never stay up late         D．Keep away from snacks．