When we arrived in ________ used to be called the foggy capital,we found London completely changed.London is now one of the capital cities in the world with the finest air quality.
_____ him speak English so fluently, and you would think him an American.
There is a crowd of people in front of the house over there. What do you suppose _____ there?
I don’t like _____ speaking ill of each other.
The electricity ____, the light went out.
The subjects we have at school _____biology.