I smell something ________in the kitchen. Can I call you back in a minute?
After the former manager returned from abroad, our company _______ and the production doubled.
If you ______ Mary, ask her to come and see me.
The machine is so advanced that it will start ______ you press the button.
What _______ the doctors most was that they could not find the cause of the strange disease.
It is ________ that Arthur gave back the money he found.