Russia’s president fires senior military officers for failing to stop a naval base _________ by wildfires that have killed 48.

Since then, more than 2 billion apps have been downloaded at prices ________ free to $900.

         _______ in the 1800s and first mass-produced in Germany, the harmonica(口琴) was designed to play simple folk tunes.

The old scientist has been invited to a party ________ next Monday evening.

As soon as she entered the room, the girl caught sight of the flowers ________ by her mother.

________ he had won the first prize, he felt very happy.

________ their lessons, they went to the cinema.

The boy ________ a blue jacket is John’s brother.

Mr. Smith is busy these days ________ a new book on how to develop a child’s reading skill.

___________________, and we will do the work better.