You have to explain us the reason your being absent from school yesterday.
A. to; of
B. to; why
C. for; that
D. to; for
网友回答
A. to; of
B. to; why
C. for; that
(答案→)D. to; for
解析：explain sth to sb 把......向某人解释，所以第一空用to；the reason your being absent from school yesterday.你昨天上学迟到的原因，……的原因，用for the reason。所以选D。