1) It's optional to attend the meeting. a) You mustn't attend the meeting. b) You don't have to attend the meeting. 2) It is against the rules to park here. a) You mustn't park here. b) You don't have to park here. 3) It's not necessary to bring your own food. a) You mustn't bring your own food. b) You don't have to bring your own food. 4) You are strictly forbidden to touch the exhibits. a) You don't have to touch the exhibits. b) You mustn't touch the exhibits. 5) It’s not necessary to wake up early tomorrow. a) You don't have to wake up early tomorrow. b) You mustn't wake up early tomorrow. 6) It's optional to wear formal clothes to the event. a) You mustn't wear formal clothes to the event. b) You don't have to wear formal clothes to the event. 7) It’s not necessary to arrive early for the concert. a) You don't have to arrive early for the concert. b) You mustn't arrive early for the concert. 8) It's against the rules to make noise after 10 p.m. in the apartment building. a) You don't have to make noise after 10 p.m. b) You mustn't make noise after 10 p.m. 9) You don’t need to bring a gift to the party; it’s not expected. a) You don't have to bring a gift to the party. b) You mustn't bring a gift to the party. 10) It’s optional to participate in the team-building activity. a) You don't have to participate in the team-building activity. b) You mustn't participate in the team-building activity. 11) It’s against the rules to bring pets into the restaurant. a) You mustn't bring pets into the restaurant. b) You don't have to bring pets into the restaurant. 12) It's not necessary to call ahead to make a reservation. a) You mustn't call ahead to make a reservation. b) You don't have to call ahead to make a reservation. 13) It’s forbidden to smoke inside the building. a) You mustn't smoke inside the building. b) You don't have to smoke inside the building.

mustn't VS don't have to

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