20. Robert arrived without his book. He _________ it. a. could have lost b. should have lost c. would have lost d. will have lost 21. “Where do you think Rooney is today?”. “I have no idea He _________ late.” a. should have left b. would have sleep c. would sleep d. may have slept 22. Berbato painted his bedroom black. It looks dark and dreary. He _________ a different color. a. had to choose b. should have chosen c. must have chosen d. could have been choosing 23. The children _________ “thank you” to you when you gave them their gifts. a. will have said b. must say c. should have said d. should say 24. If we had known your new address, we _________ to see you. a. came b. would have come c. will come d. would come 25. These two boys look identical. They _________ twins. a. must have been b. must be c. should be d. should have been