第二节 请认真阅读下面短文，从短文后所给的六个选项中选出五个可以填入空白处的最佳选项。
We all know exercise helps keep our hearts healthy. 41 But many people find it hard to make time for regular exercise. The good news is that even small amounts matter.
Scientists have found something interesting. The less active you are now，the more benefits(好处) you'll get. Just from a little exercise! If you sit most of the day and rarely move，2 hours of simple activities a week can be life-changing. This could be like riding in the park，fast walking with friends，or playing outdoor games. 42 These easy exercises can lower your heart disease risk by about 20%!
However，the benefits work differently for people who already regularly exercise. ______ 43 ______ After 4—6 hours of exercise a week，the heart protection doesn't increase much. This means both beginners and regular exercisers can find suitable exercise plans.
44 For busy people，weekend exercise still helps. Even if you only have time on Saturdays and Sundays，those 2—3 hours of sports or swimming count.
The key message is clear. Any exercise is better than none. 45 You can try ten-minute walks daily，dancing to music，or taking stairs instead of elevators. You will have a healthier heart.
Remember，staying healthy doesn't require becoming an athlete. Find activities you enjoy，make small changes，and keep doing them. Two hours might sound short，but it's enough to start protecting your heart and changing your life!
A. For active people，their heart benefits grow slower as they exercise more.
B. Doctors say what matters most is getting moving，not when you do it.
C. Finding time to exercise in the park is a challenge.
D. It can lower blood pressure and reduce heart attack risks.
E. You'll be surprised to find it can make a big difference.
F. Start with what you can manage.
41. 42. 43. 44. 45.
We all know exercise helps keep our hearts healthy. 41 But many people find it hard to make time for regular exercise. The good news is that even small amounts matter.
Scientists have found something interesting. The less active you are now，the more benefits(好处) you'll get. Just from a little exercise! If you sit most of the day and rarely move，2 hours of simple activities a week can be life-changing. This could be like riding in the park，fast walking with friends，or playing outdoor games. 42 These easy exercises can lower your heart disease risk by about 20%!
However，the benefits work differently for people who already regularly exercise. ______ 43 ______ After 4—6 hours of exercise a week，the heart protection doesn't increase much. This means both beginners and regular exercisers can find suitable exercise plans.
44 For busy people，weekend exercise still helps. Even if you only have time on Saturdays and Sundays，those 2—3 hours of sports or swimming count.
The key message is clear. Any exercise is better than none. 45 You can try ten-minute walks daily，dancing to music，or taking stairs instead of elevators. You will have a healthier heart.
Remember，staying healthy doesn't require becoming an athlete. Find activities you enjoy，make small changes，and keep doing them. Two hours might sound short，but it's enough to start protecting your heart and changing your life!
A. For active people，their heart benefits grow slower as they exercise more.
B. Doctors say what matters most is getting moving，not when you do it.
C. Finding time to exercise in the park is a challenge.
D. It can lower blood pressure and reduce heart attack risks.
E. You'll be surprised to find it can make a big difference.
F. Start with what you can manage.
41. 42. 43. 44. 45.
答案：41. D 42. E 43. A 44. B 45. F
解析：
翻译:
我们都知道运动有助于保持心脏健康。它可以降低血压，减少心脏病发作的风险。但很多人发现很难抽出时间进行规律的锻炼。好消息是，即使少量的运动也有作用。
科学家们发现了一件有趣的事。你现在活动得越少，从少量运动中获得的好处就越多！如果你一天大部分时间都坐着，很少活动，每周2小时的简单活动就可能改变生活。这可以是在公园里骑车、和朋友快走，或者玩户外游戏。你会惊讶地发现它能带来很大的不同。这些简单的运动可以将你患心脏病的风险降低约20%！
然而，对于已经经常锻炼的人来说，好处的变化情况不同。对于活跃的人来说，随着他们锻炼得更多，心脏得到的益处增长得更慢。每周锻炼4到6小时后，对心脏的保护作用不会增加太多。这意味着初学者和经常锻炼的人都能找到合适的锻炼计划。
医生说最重要的是动起来，而不是你什么时候运动。对于忙碌的人来说，周末锻炼仍然有帮助。即使你只有周六和周日有时间，那2到3小时的运动或游泳也是有效的。
关键信息很明确。有运动总比没有好。从你能做到的事情开始。你可以尝试每天散步十分钟、跟着音乐跳舞，或者走楼梯而不是坐电梯。你的心脏会更健康。
记住，保持健康不需要成为一名运动员。找到你喜欢的活动，做出小的改变，并坚持做下去。两个小时听起来可能很短，但它足以开始保护你的心脏并改变你的生活！
我们都知道运动有助于保持心脏健康。它可以降低血压，减少心脏病发作的风险。但很多人发现很难抽出时间进行规律的锻炼。好消息是，即使少量的运动也有作用。
科学家们发现了一件有趣的事。你现在活动得越少，从少量运动中获得的好处就越多！如果你一天大部分时间都坐着，很少活动，每周2小时的简单活动就可能改变生活。这可以是在公园里骑车、和朋友快走，或者玩户外游戏。你会惊讶地发现它能带来很大的不同。这些简单的运动可以将你患心脏病的风险降低约20%！
然而，对于已经经常锻炼的人来说，好处的变化情况不同。对于活跃的人来说，随着他们锻炼得更多，心脏得到的益处增长得更慢。每周锻炼4到6小时后，对心脏的保护作用不会增加太多。这意味着初学者和经常锻炼的人都能找到合适的锻炼计划。
医生说最重要的是动起来，而不是你什么时候运动。对于忙碌的人来说，周末锻炼仍然有帮助。即使你只有周六和周日有时间，那2到3小时的运动或游泳也是有效的。
关键信息很明确。有运动总比没有好。从你能做到的事情开始。你可以尝试每天散步十分钟、跟着音乐跳舞，或者走楼梯而不是坐电梯。你的心脏会更健康。
记住，保持健康不需要成为一名运动员。找到你喜欢的活动，做出小的改变，并坚持做下去。两个小时听起来可能很短，但它足以开始保护你的心脏并改变你的生活！