variables

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

"The complexity of the math problems made it difficult for many students to solve them. "

"The student is representing the country of France in the class presentation. "

"Astronomers use telescopes to study planets and stars. "

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

"The intermediate level of Spanish class is a good fit for students who already know some basic vocabulary. "

"The brightness of the classroom light made it easy to see the teacher's notes. "

"The painting represents the artist's vision of a peaceful countryside. "

"The weather today is an unpredictable. "

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

"The cat was sleeping on the couch, but when I came back, it had disappeared. "

"Turning the corner, I discovered a lovely little shop. I discovered that they sold widgets."