33. --Were you at home at 7:00 yesterday evening? I called you but no one was there.
--Sorry, we ___________ a movie at the theatre at that time.
A. watch B. were watching C. watched D. are watching
34. The boy often ________ his homework at school.
A. leave B. leaves C. forget D. forgets
35. --Mark, you look so tired.
--Oh, I didn’t go to bed _______it was 12 o’clock last night
A. before B. after C. until D. when
36. You can find ___ difficult t o learn English.
