2. A recent survey shows that 44 percent of Americans want to use self-driving cars, _________ 34 percent believe that they will make the roads more dangerous.
4. Ants are pretty small. You might think that they _________be rather weak. But what you might not know is that ants are actually very strong for their size.
5. "Left—behind" children _________see their parents, because their parents work in the cities, leaving them behind in the countryside to be cared for by their grandparents.