1) Mary always does really well on exams. She ___________ study a lot. (It's certain) a) must b) might 2) That woman drives a very expensive car. She ___________have a lot of money. (It's certain) a) must b) can't 3) David ______________ drink a lot of coffee. He’s finished two packets already this week! (It's certain) a) must b) might 4) Who’s that at the door? It ________ be Susie – she’ll still be at work now. (It's impossible) a) might b) can't 5) You’ve already eaten enough for three people! You ___________ still be hungry!. (It's impossible) a) might b) can't 6) They're coming this week but I don't know which day. They _____________be coming tomorrow. (It's possible) a) must b) might 7) I __________ pass the exam. I don't feel very confident. (It's possible)  a) must b) might 8) I've bought a lottery ticket. I________ become a millionaire! (It's possible) a) might b) can't 9) Someone told me that Mark was in Mexico but I saw him yesterday, so Mark _________ be abroad. (It's impossible) a) must b) can't 10) He ____________ be here. I can see his car in front of the building. (It's certain) a) must b) must not

CCCN: Modals of probability- certainty

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