Nobody knows for sure how dinosaurs died out 65,000,000 years ago. It _______ because of sudden changes of their living conditions.

I have lost one of my gloves. I _____ it somewhere.[ ]

Some students go to school without _______ breakfast.

I’ m sorry, I mistook you ___ your sister ___ mistake.

The T-shirt I received is not the same as isshown online. — ______ But I promise you we’ll lookinto it right away.