问题补充：
--Would you be to help me with my study?---Ill be very glad it.
A. too kind, doing
B. very kind, doing
C. as kind as, to do
D. so kind as, to do
答案：
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.
