inexhaustible

"My friend told me there was something in the box, but I didn't know what it was yet. "

"My grandmother taught me how to bake cookies when I was a child. "

"Pat is definitely a she."

"Are you doing your homework right now? "

"He seems to be ill.   Her eyes seem blue.   It seems like it is going to rain later.   How did she seem to you?"

"The car's exhaust was making a loud rumbling noise. "

"The wealthy have in our town often send their children to private schools. "

"supply and demand"

"Airplanes did not always exist as a form of transportation."

"The children's energy fueled their excitement for the school trip. "

"The impossible of finishing the project by Friday became a reality when everyone worked late. "

"The library has unlimited access to books online. "