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
English is spoken ____ a second language in many countries. Many Chinese learn it ____ different ways.
#48818
A
to, for
B
by, as
C
as, in
D
for, by
Guangzhou is becoming more and more beautiful, we are really proud ______ it.
#48047
A
of
B
in
C
to
D
at