7.In most of the world, the senior managers of large businesses are mainly men in their fifties and sixties.其中“in one’ s fifties/sixties”意为“五十多岁/六十多岁”，在“in one’ s +年龄”中，这个年龄只能是20到90整十的复数形式，具体说几岁时则用at the age of。
8....to gain the freedom and control over their lives that they’ re unlikely to get from being emplo