--- Hello! Is Mr. John in the office?--- Yes. But I’m sorry. He is busy _________ and can’t speak to you.
How long do you think _________ the computer company launches a new model?
Miss Li ______ as a secretary for five years in the company, and now she is general manager of it.
A warm thought suddenly came to me _______ I might buy some flowers for my friend's mother’s 60th birthday.
Though a typhoon is on the way, people are still looking forward _________ the outdoor concert.
-Mary, how did your Math test go?-I had thought I _________, but in fact I came in the top 10 in my class.