What's the right tag for these sentences? Someone told the boss, a. did he? b. didn't he? c. didn't they? Nobody has come in late, a. have they? b. do they? c. don't they? Nobody comes in late, a. do they? b. don't they? This

Are these sentences correct? All questions have to have been answered. Your date of birth needs to have been included. But is it more likely we say them like this daily: All questions have to be answered. Your date of birth needs to be included.

(P 331, The Little Brown Book) Even though I knew I should stop, I kept on driving, once barely missing a truck. I guess 'barely missing a truck' means almost hit a truck, but use 'missing' here doesn't make sense to me. Is