The university is saving $ 300,000 per year by its energy ______ efforts.
—He didn’t feel a bit nervous when ________. —No.He’d had a lot of time ________ for it after all.
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.
考点:时态和语态
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.