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Two of the sentences below are correct. Tick them. The other sentences contain mistakes with modals. Underline the mistakes and correct them.
1 You couldn't see a UFO last night. You must have dreamt! couldn't have seen, must have been dreaming
2 They may land astronauts on Mars some time in the future. ......
3 Didn't you hear what the police officer said last night? You can't listen. ....
4 Maria may be coming to stay with us. She's going to let us know very soon....
5 Aliens can't try to contact us at the moment, otherwise we would have received signals from them.....
6 I must lose my key! I can't find it anywhere....
7 Paul says he's been inside an alien spacecraft. He must imagine it!....
8 Stella can't go to Canada this morning. I've just seen her on the beach. Ajutati ma va rogg​