----- Nội dung dịch tự động từ ảnh ----- 16. You must hand in your report before the end of this month. 17. I had just finished the job when the factory closed. 18. No one has opened that box for the past hundred years. 19. Are you going to mail these letters soon? 20. He should have finished the report yesterday. 21. Scientists carried out researches on SIDA two years ago. 22. I will arrange everything in time. 23. We haven't moved anything since they sent you away to cure you. 24. She fell into water because somebody pushed her. 25. What ought we to do about this?
