1) You ___ wear a helmet when riding a bike. a) can b) should c) may d) need 2) I ___ finish my homework before going out. a) must b) can c) ought to d) may 3) She ___ be at the office now. a) can b) may c) should d) have to 4) You ___ see a doctor if you feel unwell. a) can b) ought to c) may d) need 5) We ___ leave early to catch the train. a) must b) have to c) can d) may 6) He ___ speak three languages fluently. a) can b) must c) should d) ought to 7) You ___ not smoke in public places. a) must b) can c) may d) need 8) I ___ go to the party if I finish my work. a) can b) must c) ought to d) need 9) We ___ bring an umbrella, it might rain. a) should b) can c) may d) must 10) You ___ apologize for being late. a) ought to b) can c) may d) need 11) They ___ arrive by noon. a) must b) can c) should d) may 12) I ___ finish this report by tomorrow. a) have to b) can c) may d) ought to 13) You ___ not drive without a license. a) must b) can c) may d) need 14) She ___ be at home now. a) may b) can c) should d) have to 15) We ___ finish the project by next week. a) must b) can c) may d) ought to 16) You ___ not eat so much sugar. a) should b) can c) may d) need 17) I ___ call her later. a) can b) must c) ought to d) need 18) He ___ not be late for the meeting. a) must b) can c) may d) need 19) You ___ take a break if you're tired. a) should b) can c) may d) must 20) We ___ not forget to lock the door. a) must b) can c) may d) need

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