问题
选择题
Is this the reason _______ at the meeting for his carelessness in his work?
A.he explained
B.what he explained
C.how he explained
D.why he explained
答案
A
空白处引导定语从句,先行词是reason,因B、C两项不能引导定语从句,应排除。D项有一定干扰性,因先行词为the reason,但是,从句中缺少的是explained的宾语,不用why引导,应用which或that或省略。