ko cần giải thích đâu ak, nhanh giúp mình, chốc nx là mình phải nộp cô rồi 1. I ________ by then. will be leave will have left will leaving 2. Will you ________ by 8am? have arrived be arrive have arriving 3. You ________ the bill by the time the item arrives. 'll have received will receiving 've received 4. Melissa and Mike will be exhausted. They ________ slept for 24 hours. will not will not have will not be 5. He will have ________ all about it by Monday. forgetting forgotten be forgetting 6. Will you ________ the contracts by Thursday? have mailed mailing to have mailed 7. The boss ________ by the time the orders come in. will leave will be left will have left 8. Where ________ gone? will she have is she has she have 9. September works for us. Lisa will not ________ by then. graduating have graduated be graduate 10. I will let you in. I ________ with the keys by the time you come in. will have arrived will be arrival will be arrived