1) Teacher Ju ____________ argued with her husband because he didn't clean the bathroom. a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 2) Le still hasn't done her homework. Teacher Ju ____________ warned her about the due date. a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 3) Teacher Ju ____________ waited for Le to start the class. She was just five minutes late! a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 4) I'm not sure if Le was able to find the book I've recommended to her. I ____________ forgotten to mention the author's name. a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 5) The police ____________ prevented the bomb from exploding. Not even a specialist could have solved that puzzle. a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 6) Le ____________ beaten her latest score. She was able to answer everything by heart! a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 7) Le ____________ avoided a big fight between her boss and their client. That's why he hired her. She is such a calm person! a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 8) Teacher Ju ____________ won the race. She is a terrible runner! a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 9) I'm 100% sure that Le ____________ borrowed the teacher's Ju book! She bought herself one at the beginning of the year. a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have 10) Teacher Ju ____________ stolen Le's bicycle! Such attitude is out of the law. Shame on her! a) must have b) might / may / could have c) can't have / couldn't have d) should / ought to have e) might / may not have f) should / ought not to have

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