11.) Commuters (can’t, mustn’t) cross the streets if the lights are red. 12.) (Should, Could) I borrow your pen for a moment? 13.) You (mustn’t, don’t have to) come to the meeting, but it will be fine if you are there. 14.) You (must, have to) start saving money if you want to retire in few years. 15.) (Can, May) I see your passport, please? 16.) The rules say that you (can, have to) only invite one guest to the club. 17.) I (must, have to) stay on a few hours because I’d rather work late today than over the weekend. 18.) Did I tell you that you (don’t have to, can’t) come to this area, it’s restricted to staff only. 19.) We (have to, can) be there fifteen minutes before the concert starts. 20.) I can’t get connection on my phone. (Can, Should) I borrow yours?​