1) A cat _________ run fast but it can't fly. a) can b) can't c) mustn't 2) He ________ play a guitar when he was a child. Because he didnt' have a guitar. a) could b) has to c) couldn't 3) You ____________ study harder if you want to pass the exam. a) could b) must c) shouldn't 4) She _______ finish her homework on time because her internet was down. a) couldn't b) must c) could 5) He ______ drive a car, because he doesn't have a license yet. a) has to b) mustn't c) can 6) We ________ bring umbrellas because it's going to rain later. a) must b) could c) might 7) She ________ call her friend yesterday because her phone was broken. a) couldn't b) has to c) can 8) She _________ wear formal clothes because she is going to go to the meeting. a) might b) can c) must

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