1) You think I'm going to buy that? You ____ be joking. a) can b) could c) are able to d) must e) should 2) I know I ____n't buy this bag, but I'm going to. a) should b) must c) can d) could 3) I don't think he ____ go to school today. a) must b) can c) could d) should 4) Children_____take off their shoes here. There is broken glass on the floor. a) shouldn't b) can't c) have to d) aren't able to 5) Ann _____stay after the office hours, but she does sometimes. a) should b) doesn't have to c) can't d) must 6) I'm free tonight, so I'll ____come and help you. a) I'll be able to b) could c) can d) have to 7) She says that she _____ speak five languages fluently a) have to b) should c) can d) is able to 8) She fell into the river, but fortunately the firefighters ______ rescue her. a) should b) were able to c) had to d) could

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