---Did you notice someone enter the classroom just now?
---Sorry, I didn’t. I _____ my lessons at that time.
A.am doing | B.did |
C.do | D.was doing |
---Did you notice someone enter the classroom just now?
---Sorry, I didn’t. I _____ my lessons at that time.
A.am doing | B.did |
C.do | D.was doing |
试题篮
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