We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.
It was only after he had read the papers _____Mr. Gross realized the task before him was extremely difficult to complete.
When I arrived, Bryan took me to see the house,_____ I would be staying.
_______ more and more people speak the global languages of English,Chinese, Spanish, and Arabic, other languages are rapidly disappearing.
A small plane crashed into a hillside five miles east of the city, _____all four people on board.