Basically，these attitudes amount to a belief ________ leisure can and should be put to good use
B
空格前面是belief，后面是一个结构完整的句子，解释说明belief的具体内容。所以用that引导这个同位语从句。
Theprofessorworkedfor7hoursata________.
Thevehiclewastravelingatspeeds________90milesperhour.
When_______,waterwillbeturnedintosteam.
英语翻译：他是公司的首席执行官,但总是平易近人。
AlthoughTomissatisfiedwithhisacademicachievement，hewonders_______willhappentohisfamilylife.
