1) The house is empty and there is a “for sale” sign in front of it. The Kims ________ moved away. a) might have b) must have c) may have d) couldn´t have 2) The people who lived in this area thousands of years ago ________ spoken similar languages, but it is impossible to know for sure. a) must have b) couldn´t have c) may have d) could have 3) Before they became available to the general public, people ________ imagined how much smartphones were going to change our world. There’s no way. a) couldn´t have b) must have c) may not have d) might not have 4) Historians aren’t sure, but they think that the festival ________ started as a way to celebrate the end of the rainy season. a) might have b) may have c) must have d) couldn´t have 5) The software doesn’t seem to be working and it says there was an error in the installation, so despite what he says, he ________ installed it properly. a) couldn´t have b) might not have c) may not have d) must have 6) Prabhjot didn’t have his laptop when I saw him. I’m not sure, but he ________ brought it to school today. a) may not have b) must have c) couldn´t have d) might not have 7) Pacific peoples ________ travelled across oceans thousands of years ago because there is evidence that they lived on many different islands in the Pacific Ocean. a) may have b) must have c) couldn´t have d) could have 8) It ________ been easy for my parents to immigrate to this country; they had to work really hard to be successful here. a) could have b) couldn´t have c) may not have d) may have

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