题目内容
【题目】It is difficult for any of us to eat better, exercise more, and sleep enough, ______ we know we should.
A. because B. even if
C. unless D. before
【答案】B
【解析】句意:对于我们任何人来说,吃好点儿,多运动点儿,睡足点儿是困难的,即使我们懂得应该那么做。此题考查让步状语从句的连接词。because因为,引导原因状语从句; even if即使,引导让步状语从句; unless除非,引导条件状语从句; before 在……之前,引导时间状语从句。
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