Răspuns:
C. 1) hasn't seen; 2) have looked ; 3) last went; 4) hasn't found; 5) has taught; 6) for; 7) yet; 8)has developed.
D. 1) have already ate; 2) have left ; didn't seen; 3) have never eaten; 4) didn't started; 5) hasn't gone; has been; 6) A. have bought ;B. did bought; 7)did you flew; have flown; 8) has overslept; missed; hasn't done
