Q46. I went to the box office at lunch time, but they  already  sold    ( already/sell ) all the tickets.

Q47. I felt very tired when I got home, so I   went    ( go)  straight to bed.

Q48. I    was waiting     ( wait )   ​for the manager for two hours.

Q49. Two days ago I    met     ( meet ) an old friends who I    didn't see    ( not see)  for years.

Q50. Last night, I     went      ( go ) to Jim's room and      knocked         ( knock ) on the door but there  was 
( be ) no answer. Either he    went       ( go ) out or he didn't want   ( not want ) to see anyon