Choose the best alternative. 1) My parents are middle-aged/-ages now. 2) He used to be a heavy/big smoker. 3) Mick and Joanne got/had engaged last week. 4) I got on/in touch with an old friend via the website. 5) We don’t have to/can’t catch a taxi. I’ll drive. 6) I should/have to do more exercise. I’m putting on weight. 7) I have to/can go into the army for a year. I don’t have a choice. 8) You shouldn’t/don’t have to smoke during meals – it’s annoying.