问题：
Tom is _______university student and he majors _______management at college.
[ ]
A. an, in
B. a, in
C. an, /
D. a, at
Tom is _______university student and he majors _______management at college.
B. a, in
C. an, /
D. a, at
[ ]
A. an, in B. a, in
C. an, /
D. a, at
参考答案：