87. _____________________________(多亏了一系列的新发明),doctors can treat this disease successfully.
88. In my sixties, one change I notice is that ______________________(我比以前更容易累了).
89. I am going to pursue this course, _____________________________________ (无论我要做出什么样的牺牲).
90. I would prefer shopping online to shopping in a department store because _________________(它更加方便和省时).
91. Many Americans live on credit, and their quality of life _____________________(是用他们能够借到多少来衡量 的), not how much they can earn.