16. I will come and see you before I________for America. A. leave                           B. will leave                   C. have left                  D. left 17. When the first child was born, they _______ for three years. A. have been married    B. had been married      C. will be married         D. will have been married 18. It________a long time since we were apart. I did not recognize her. A. is    B. has been     C. was D. had been 19. Many of the people who attended Mr. David’s funeral________him for many years. A. didn’t see   B. wouldn’t see           C. haven’t seen                                   D. hadn’t seen 20. We were both very excited about the visit, as we________each other for________ages. A. never saw   B. didn’t see               C. hadn’t seen                                     D. haven’t seen
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