[解析]
(1)联系下文题。根据第二段第一句 Strength exercises are among the best exercises for seniors. (力量练习是老年人最好的运动之一。)和第三段第一句Balance exercises are good for senior citizens as well because they build up muscles in the legs and strength in the lower body.(平衡运动对老年人也有好处,因为它可以锻炼腿部肌肉和下半身的力量。)可知,空处是总起句,谈论为老年人选择多样化的运动。故G项"当谈到为老年人选择最好的运动时,多样性是关键。"引起下文,符合语境。故选G。
(2)推理判断题。根据上文Strength exercises are among the best exercises for seniors.(力量练习是老年人最好的运动之一。)以及下文These exercises can also improve a senior citizen's metabolism(新陈代谢),which can be important for the maintenance of healthy blood sugar levels and normal weight.(这些运动还可以改善老年人的新陈代谢,这对维持健康的血糖水平和正常的体重很重要。)可知,空处应该谈论力量练习的好处。故E项"它们有助于增强肌肉,使骨骼更强壮。"承上启下,符合语境。故选E。
(3)联系上文题。根据上文They can help a senior citizen have better stability,translating into lowered risk of serious falls.(它们可以帮助老年人保持更好的稳定性,从而降低严重摔倒的风险。)可知,下文应该讲述摔倒的风险。故B项"这样的事故往往会使他们生病和虚弱。"承接上文,符合语境。选项中的Such accidents指代上文中的serious falls。故选B。
(4)段落大意题。根据下文They help improve flexibility,making it easier for an older person to remain physically active and move around without stiffness(僵硬) and pain.Additionally,stretching exercises help senior citizens avoid muscle related injuries,which can occur in the course of exercising as well as during daily living.(它们有助于提高灵活性,使老年人更容易保持身体活跃,走动时没有僵硬和疼痛。此外,伸展运动可以帮助老年人避免肌肉性损伤,这可能发生在运动过程中以及日常生活中。)由此可知,本段主要讲述伸展运动非常适合老人。故C项"伸展运动对老年人来说也是很重要的运动。"能够概括段落大意,符合语境。故选C。
(5)联系上文题。根据上文Though exercise is good for senior citizens,it is smart for seniors to speak with their doctors before starting any new exercise program.(虽然锻炼对老年人有好处,但老年人在开始任何新的锻炼计划之前,最好先和他们的医生谈谈。)可知,此处应该谈论医生的建议。故F项"他们可能会建议具体的运动和运动频率。"承接上文,符合语境。故选F。