-What are they doing? -They are talking the phone their life.
#50093
A
on; about
B
in; about
C
to; about
D
on; on
推荐题目
Students must be strict _________ their studies and teachers should be strict ________ their students.
#50581
A
in ; at
B
at; with
C
with ; in
D
in ; with
There is a big tree ________ the classroom.
#48535
A
in front of
B
at the front
C
in the front of
D
in front