It is really _______ useful dictionary and _______ dictionary every one of us needs.
Polar bears liveon sea ice, which they use as a platform for hunting seals.
The washing machine is environmentally friendly because it uses ___ water and electricity than ___ models.
—Was it two months ago__ you luckily got an opportunity to spend your holidays in Spain? —______. John was the lucky dog.
In ______________, fashions changed and many factories closed down.
They ______ a small laboratory and devoted every spare moment to this work.