--- Betty, could you answer my question?
--- Sorry, Mr. Green. I didn’t hear you. I _______ about something else.
A.was thinking | B.am thinking | C.think | D.thought |
--- Betty, could you answer my question?
--- Sorry, Mr. Green. I didn’t hear you. I _______ about something else.
A.was thinking | B.am thinking | C.think | D.thought |