Question

— Do you know ______ yesterday afternoon?
— Sorry, I’ve no idea

1. A.
   where was Tom
2. B.
   where Tom was
3. C.
   where is Tom
4. D.
   where Tom is

Answer 1

B
本题know后跟的是宾语从句，用正常的陈述顺序，故本题不选AC，本题中含有过去的时间状语，故从句用过去时，故本题选B。