Basically，these attitudes amount to a belief ________ leisure can and should be put to good use
A、whichB
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。
________，hehadnotimetorest.
Robotsdifferfromautomaticmachines________aftercompletionofonespecifictask，theycanbereprogrammedbyacomputertodoanotherone.
I understood from her that you undertook other important work ______.
Theprofessorworkedfor7hoursata________.
Since we have a focused subject ，we should not talk ________.
