The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.
She was scared the yard because she was scared by the big dog at the gate.
The old couple often take a walk after supper in the park with their pet dog them.
-- Tommy, your mum has been out without glasses!-- Well, take it easy. she is back home for them.
The new generation of computers, with artificial intelligence, _______and perfected now.
In order to decrease the death rate, the rescue team are in saving more lives.