manmade

"The beaver was damming the stream with branches and mud. "

"The liftoff will occur in exactly twelve seconds."

"You can create the color orange by mixing yellow and red."

"Occasionally rivers overflow their banks and cause floods."

"It is entirely up to you where we go, as I’ll be happy with anywhere."

"There is still time to oppose this plan."

"The flowers were artificial, and he thought them rather tacky."

"There were so many people at the restaurant last night."

"Nature never lies (i.e. tells untruths)."

"Hey, beautiful!"

"The scientist studied the properties of the synthetic fiber. "

"The small lake behind the school building serves as a drain for rainwater runoff. "