When did Bill Gates make my first million dollars on software? A. by the time he was 25 B. by the time I’m 25 C. by the time I was 25 D. by the time he is 25
Giải thích
Chọn B
Dẫn chứng: He said, ‘I’m going to make my first million dollars on software by the time I’m 25.’ And he did!