Đề thi trắc nghiệm bằng A -0050 1) They have been raising horses and cows on their farm ___ many years. a) after b) for c) since d) 2) John and Bob have been working on this project ___ five months already. a) after b) for c) since d) 3) I haven't seen him ___ a long time ago. a) after b) for c) since d) 4) She's been sick ___ yesterday. a) after b) for c) since d) 5) He's been working in the field ___ early this morning. a) after b) for c) since d) 6) He hasn't been in jail ___ more than three years. a) after b) for c) since d) 7) He came back home ___ the show ended. a) after b) for c) since d) 8) They've been teaching here ___ quite a long time. a) after b) for c) since d) 9) He hasn't been in jail ___ that time. a) after b) for c) since d) 10) We've been here ___ noon. a) after b) for c) since d) . Đề thi trắc nghiệm bằng A -0050 1) They have been raising horses and cows on their farm ___ many years. a) after b) for c) since d) 2) John and Bob have been working on this project. five months already. a) after b) for c) since d) 3) I haven't seen him ___ a long time ago. a) after b) for c) since d) 4) She's been sick ___ yesterday. a) after b) for. since d) 5) He's been working in the field ___ early this morning. a) after b) for c) since d) 6) He hasn't been in jail ___ more than three years. a) after b) for c) since