问题补充：
Danielis are talking his grandpa his new school the phone.
A. to, on, in
B. with, about, m
C. to, about, on
D. with, on, to
答案：
A. to, on, in
B. with, about, m
(答案→)C. to, about, on
D. with, on, to
解析：考查短语： talk to/with sb about sth,和某人谈话关于某事，on the phone 通过电话，句意: Danielis通过电话正在和爷爷谈论他新学校的事。故选C。
