We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
Teenagers have reached a point in their life_____they are supposed to make decisions of their own for the first time.
They are considering ____ the house before the prices go up.
_______ more about Participant Service of Expo 2010, Shanghai China, call Hotline +86-21-962010.
— Why did you leave that company?— I _______ a better position at IBM.
— She looks very happy. She _______ have passed the exam. — I guess so. It’s not difficult after all.