It is difficult for any of us to eat better, exercise more and sleep enough we know we should.
A. despite
B. even though
C. as if
D. unless
网友回答
A. despite
(答案→)B. even though
C. as if
D. unless
解析：考查词性词义：A. despite介词，虽然，B. even though连词，既然，C. as if 连词，好像，D. unless连词；除非，句意是：我们每个人想吃得好，多锻炼，睡眠足够都很难，即使我们知道应该这么做。选B。A的词性不对。