His father is __________ engineer and he works __________ research.
#49406
A
an, on
B
an, with
C
the , on
D
a, with
推荐题目
--What is 12 divided __________ 3? --__________________.
#46213
A
by; 4
B
with; 15
C
by; 36
D
from; 9
The pay phone is ____ the post office  ____ the library.
#48909
A
across from
B
between…and
C
next to
D
in, of