题干
Dr Ma______ in a hospital but now he works for ORBIS on the plane.
A：used to work
B：used to working
C：was used to working
D：was used to work
答案(点此获取答案解析）
A
Dr Ma______ in a hospital but now he works for ORBIS on the plane.
A：used to work
B：used to working
C：was used to working
D：was used to work
