I don’t think it is __________taking the trouble to explain the question to him.
European football is played in 80 countries, _________it the most popular sport in the world.
___________his work, he went back to work after supper.
When I got back home I saw a message pinned to the door_____“Sorry to miss you, will call later.”
The reading room is_______the classroom.
Rather than________on a crowded bus, he always prefers___________a bicycle.