1) The lights are on. Someone ___ to turn them off. a) could have forgotten b) might have forgotten c) can’t have forgotten d) must have forgotten 2) My parents are not at home. They ___ to the store.  a) must have gone b) can’t have gone c) might have gone d) couldn’t have gone 3) It’s impossible! They ___ the project overnight. a) must have finished b) can’t have finished c) might have finished d) could have finished 4) The windows are broken. Someone ___ them. a) must have cleaned b) can’t have cleaned c) could have broken d) might have broken 5) The cake is half-eaten. Someone ___ it. a) must have eaten b) could have eaten c) might have eaten d) can’t have eaten 6) The dog is barking. It ___ something outside. a) can’t have seen b) might have seen c) could have seen d) must have seen 7) The room is messy. The kids ___ here. a) can’t have played b) might have played c) could have played d) must have played 8) The ground is wet. It ___ rained in the morning. a) must have b) can’t have c) might have d) couldn’t have

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