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问题: 英语语法18

He has formed a habit of keeping a diary every day,______
A.however late it will be
B.no matter how late it is
C.no matter how late he is
D.however it is late
要详细的过程和思路

解答:

B。
however/no matter how从句关系代词,与late形容词一起构成从句的状语部分,并且前置,因此不能分开,排除D。
late指的是时间,所以用it,不用he(late形容人的时候多指”去世、过身“的,如:his late grandpa他过世的祖父),排除C。
当主句是现在时的时候,让步状语从句用现在时,排除A。