Madame Curie is believed _______ radium.
---Can you read the sign, sir? No smoking allowed in the lift! ---__________________.
I know a little bit about Italy as my wife and I ________ there several years ago.
Between the two generations, it is often not their age, _________ their education that causes misunderstanding.
Does this meal cost $50? I __________ something far better than this!
I smell something __________ in the kitchen. Can I call you back in a minute?