A
Exercising regularly not only helps you keep slim, but also improves your overall health and well-being. Different exercises produce different results, as they focus on alternate parts of the body. There are four broad exercise categories: endurance, strength, flexibility, and balance. Many people often only focus on one exercise type, but including all four in your workout will produce better results and reduce your risk of injury.
Endurance
Endurance exercises increase your breathing and heart rate. By doing endurance exercises, you are working to keep your heart, lungs, and blood-flow system healthy while improving your total fitness. Over time these activities will make everyday activities seem easier.
Strength
If you want to build up your muscles, then strength exercises, which are also known as "resistance training", are right for you. Even the slightest increase in strength can make a huge difference in your ability to carry out daily tasks. Developing strong muscles also reduces your risk of weak bones.
Flexibility
Flexibility exercises help stretch your body's muscles. This allows for more freedom of movement for other exercises and can also improve your range of motion, posture, ability to breathe deeply, and blood flow. Also, it reduces the muscle tension caused by stress.
Balance
Balance exercises help prevent falls and are especially important to older adults, helping them stay independent. Most good balance exercises are ones that keep you constantly moving with your feet on the ground. Heel — to — toe walking and standing on one foot are simple ways to improve balance.
21. What does the writer advise people to benefit from the exercise rules?
A. By concentrating on one training aspect at a time.
B. By combining all the four exercise types together.
C. By having sufficient rest to reduce the risk of injury.
D. By timing the speed and lengthening the training time frequently.
22. Which exercise types are efficient to better a person's blood-flow system?
A. Strength and Balance B. Flexibility and Balance
C. Endurance and Flexibility D. Endurance and Strength
23. Which part of the body benefit more from strength and flexibility?
A. Arms. B. Legs. C. Bones D. Muscles
【答案】21. B 22. C 23. D
【解析】
【分析】本文是一篇說明文。文章主要介紹運(yùn)動(dòng)分為四大類：耐力、力量、柔韌性和平衡，在運(yùn)動(dòng)的時(shí)候包括這四種運(yùn)動(dòng)類型將產(chǎn)生更好的結(jié)果，并減少受傷的風(fēng)險(xiǎn)，并分別介紹了這四種類型的好處和怎樣減少風(fēng)險(xiǎn)。
【21題詳解】
細(xì)節(jié)理解題。根據(jù)第一段 “Many people often only focus on one exercise type, but including all four in your workout will produce better results and reduce your risk of injury. ”（ 很多人通常只關(guān)注一種運(yùn)動(dòng)類型，但在你的運(yùn)動(dòng)中包括這四種運(yùn)動(dòng)類型將產(chǎn)生更好的結(jié)果，并減少受傷的風(fēng)險(xiǎn)。）可知作者建議運(yùn)動(dòng)的時(shí)候包含這四個(gè)運(yùn)動(dòng)類型，將產(chǎn)生更好的結(jié)果。故選B。
【22題詳解】
細(xì)節(jié)理解題。根據(jù)Endurance中
“By doing endurance exercises, you are working to keep your heart, lungs, and blood-flow system healthy while improving your total fitness.”（ 通過耐力練習(xí)，你可以保持你的心、肺和血液循環(huán)系統(tǒng)的健康，同時(shí)提高你的整體健康水平。）和Flexibility中的“This allows for more freedom of movement for other exercises and can also improve your range of motion, posture, ability to breathe deeply, and blood flow. Also, it reduces the muscle tension caused by stress.” （這樣可以讓你有更多的自由來做其他的運(yùn)動(dòng)，也可以改善你的活動(dòng)范圍，姿勢(shì)，深呼吸的能力和血液流動(dòng)。）由此可知Endurance和Flexibility可以有效的改善人體的血液循環(huán)，故選C。
【23題詳解】
細(xì)節(jié)理解題。根據(jù)Flexibility 中的“Also, it reduces the muscle tension caused by stress. ”（ 此外，它還能減少因壓力引起的肌肉緊張。）和Strength中的“If you want to build up your muscles, then strength exercises, which are also known as ‘resistance training’, are right for you.（如果你想增強(qiáng)你的肌肉，那么力量練習(xí)，也被稱為“阻力訓(xùn)練”，適合你。）由此可知，
Strength 和Flexibility 兩項(xiàng)鍛煉都是對(duì)muscles 有益。故選D。
【點(diǎn)睛】一般定位關(guān)鍵詞適用于解答細(xì)節(jié)理解題。通過定位關(guān)鍵詞解題，考生在閱讀題干時(shí)，把題干中有標(biāo)記意義的詞或詞組標(biāo)記出來，或者選項(xiàng)中的關(guān)鍵詞，然后用這個(gè)詞回到原文當(dāng)中定位。如小題2題干中的blood-flow system，再如小題3題干中的strength and flexibility，可以幫助快速找出答案。
