—Where is Tom? — I last saw him _____ in
问题:
— Where is Tom?
— I last saw him _____ in the library, reading.[ ]
A. be sitting
B. sat
C. seated
D. seating
— Where is Tom?
— I last saw him _____ in the library, reading.[ ]
A. be sitting
B. sat
C. seated
D. seating