Giải giúp e bài 6 với! Giải thích giùm e! C. ơn ạ

away nalf an hour betöre. 21. When I came there, she. A.went 22. Sam. B.has gone C.was going D.had gone when we got there. A. already left leaving 23. He said that he B. had already left C. has already left D.was already his bicycle the day before. C.loses B. has lost that film before ...