Research ________out at Livepool University supports this idea and suggests that if we don’t use the sense of direction, we’ll lose it.

European football is played in 80 countries, _______ it the most popular sport in the world. 

When you long for life without difficulties, _____ yourselves that trees grow strong in contrary winds and diamonds are made under pressure.

My parents are ________ to live in the countryside,where the air is clean and the vegetables are fresh．

Then professor walked onto the platform and seated himself in a chair, ______ for answering questions.