.He went to the States in 1910,by _________ time he had learnt to dance and act in comedies.
You will find the game is not so difficult to play ______ you understand its rules.
The building, ______ in the shape of an egg, is now just for tourists.
Remember to take a breath of ______ fresh air and have some exercise each day. It will make ______ difference.
—Would you like to meet John at the airport?—________. He is the last person I want to see.
He had planned to make a compromise, but ______ he changed his mind at the last minute.