Peasants earn their living by selling agriculture ____ in China.
What will the world use for power when it________ oil?
This book tells_____life story of John Smith, who left______school and worked for a newspaper at the age of 16.
---Believe it or not, I have met him before. ---No kidding? ______ you’ve never mentioned it?
It is our duty to try to ______ production and reduce the number of things we make and buy.
Our factory has been developing rapidly this year. This year’s production is five times _____ it was ten years ago.