A man does not know the difficulty of anything he does it personally.A. althoughB. ifC. be

发布时间：2020-08-15 00:21:12

A man does not know the difficulty of anything     he does it personally.
A. although
B. if
C. because
D. unless

网友回答

A. although
B. if
C. because
(答案→)D. unless
解析： 连词unless本身具有否定意义：i￡．．not，引导的是否定的条件句，这种否定的条件句从反面来强调的语气，一些语法学家称它为“反面的惟一条件句”，如：  One cannot master a foreign language well unless he studies it hard．
以上问题属网友观点，不代表本站立场，仅供参考！