It’s natural for there ________ a generation gap between parents and their children.

He decided that he would drive all the way home instead of ________ at a hotel for the night.[ ]

_____ any other species, human populations are shaped by the usual forces of natural selection, like famine, disease or climate[ ]

Though most people know that smoking ________ the risk of cancer,it is still hard for them to give it up.[ ]

The underline part in the word “potatoes” is pronounced as ____.