【正确答案】：
MOST PEOPLE, WHEN THEY ARE LEFT FREE TO FILL THEIR OWN TIME ACCORDING TO THEIR OWN CHOICE, ARE AT A LOSS TO THINK OF ANYTHING SUFFICIENTLY PLEASANT TO BE WORTH DOING. AND WHATEVER THEY DECIDE ON, THEY ARE TROUBLED BY THE FEELING THAT SOMETHING ELSE WOULD HAVE BEEN PLEASANTER.
【题目解析】：考点：according to：根据；at a loss：不知所措，困惑；sufficiently：足够地；be worth doing：值得做某事；句子结构：前半句句子主干：大多数人会想不出。其余为时间状语从句和宾语从句。后半句中句子主干是“他们会想着……”；“无论做什么”是让步状语从句，“别的事可能更有趣”是他们所想的具体内容，做宾语从句。