问题

The researchers found clear and convincing evidence _________ happiness is the key when it comes to better health and longer lives

A:where
B:whether
C:how
D:that

正确答案是：

同类题型

______ Joseph off at the airport, Sally finished her work earlier.[ ]

依次填入下列横线处的词语，最恰当的一组是（）①写书人应做到用最少的文字传递最有价值的知识和信息，这无疑需要作者有更高的水平，花更大的力气。而眼下难寻而有分量的作品。②读书如“隐身串门”。要拜谒有名的作者，不必事前打招呼，也不怕扰了主人，翻过几页就可登堂入室。③唐诗和宋诗孰优孰劣，在后代引起了的争论。对唐宋诗的评价，往往因个人爱好的不同而，其实两个朝代的诗歌各有千秋，不应该用一种固化的标准评价不同风格的诗歌。

She wanted to visit her teacher for _____about her plan.

Almost every gym club in Shanghai ________ yoga classes. And there are more than 100 special clubs such as this one.

Not far from the house ____ two gardens, ______ seated nearby playing bridge with his children．