四、阅读理解。(2012，嘉兴)

　　Do you know how important it is to have breakfast?A study of 2，000 teenagers in the US showed that eating breakfast daily is helpful to young people.

　　According to the study，teenagers who eat breakfast weigh around 5 pounds less than teenagers who do not.Although they take in more calories (卡路里) in the morning，they are more active during the day because they have more energy.This means they burn more calories than non­breakfast eaters.The_breakfast_does_not_even_have_to_be_very_healthy，as_eating_anything_is_better_than_nothing.

　　The study also showed that eating breakfast keeps teenagers feeling full for longer，so they will not eat too many snacks (零食) later in the day.This is good news as most popular snacks，like sweets and potato chips，are usually unhealthy and full of calories.

　　Another big advantage of eating breakfast is that it helps teenagers do better at school.This is because it gives them more energy to keep their attention in class.

　　What's more，a study in the UK showed that adults (成年人) who eat breakfast daily put on less weight and also perform better at work.

　　Whatever your age is，take time to have breakfast every day.

　　41.The underlined sentence in Paragraph 2 means that __A__.

　　A.teenagers should eat something for breakfast

　　B.breakfast helps teenagers do better at school

　　C.breakfast must be healthy with lots of calories

　　D.the energy makes teenagers active the whole day

　　42.Having breakfast daily makes the teenagers __A__.

　　A.eat fewer snacks B.put on more weight

　　C.relax themselves D.burn less calories

　　43.The passage is mainly about __C__.

　　A.the importance of snacks

　　B.how the adults perform at work

　　C.the advantages of having breakfast

　　D.losing weight without breakfast

　　44.We can probably read this passage in a (an) __B__.

　　A.story book B.health magazine

　　C.movie poster D.instruction book