sources

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

"My teacher explained the new math concept, and I understood it perfectly. "

"The asteroid belt consists of a collection of dust, rubble, and minor planets."

"My sister is very helpful, especially when it comes to organizing things. "

"The police arrested the suspect after an informant provided key details about the crime. "

"The new school year originates many exciting opportunities for learning. "

"The transistor in the radio allowed us to hear the distant news report clearly. "

"My brother is a programmer for a video game company. "

"My new smartphone works because it contains billions of tiny transistors that control the flow of electricity. "

"The mountain spring acted as the fountainhead, continuously feeding the stream that eventually became a wide river. "

"The information about the project deadline resolved my uncertainty; now I know what needs to be completed. "

"Condoms are designed to protect against sexually-transmitted diseases."