There's actually quite a bit of variation in different regions of the us. As i said, it's quite common to hear dinner as the noontime meal in many areas of the american south. They ____have arrived at lunch time but their flight was delayed.c和d选项有什么区别，为什么c不对should have done/ought to have done（本应该做的事情没做。说话人语.
(QVC) Lunchtime Specials 2018
