Final exam units 9-10

What did the show say about the origin of the stone balls?

• They could have occurred naturally.

• It's certain that they were man-made.

• It's possible they were part of a building.

What does Lorenzo think about the origin of the stone balls?

• He thinks it's possible they occurred naturally.

• There's no question they were man-made.

• He is certain they're not man-made.

What do Fran and Lorenzo disagree about?

• how the stone balls might have been used

• who might have used the stone balls

• the size of the stone balls

Does Fran think the stone balls could have been a part of a machine?

• Yes, she's certain.

• It's possible, but she really doesn't know.

• She's skeptical. She thinks they probably weren't part of a machine.

What does Lorenzo believe about the stone balls falling from space?

• He thinks the idea is obvious.

• He thinks it's the most likely idea.

• He's not certain that it happened.

I think I left my purse on the train. I'll call the lost-and-found; someone may have turned it in.

Jim had to have been at the office this morning. His computer was turned on, and there was a hot coffee on his desk.

The bright light in the sky last night might have been from a plane. I think it's possible, even though I didn't hear any loud noises.

The stones used to build the Egyptian pyramids must have been difficult to move.

He should have been home an hour ago. I'll bet he had to stay late to finish the report that's due tomorrow.