--Would you be to help me with my study?---I'll be very glad it.
A. too kind, doing
B. very kind, doing
C. as kind as, to do
D. so kind as, to do
网友回答
A. too kind, doing
B. very kind, doing
C. as kind as, to do
(答案→)D. so kind as, to do
解析：be so kind as to do意为:请费心, 答语中的glad后跟不定式.