—How long ________ at this job?—Since 1990.
How I wish I _________ him the secret! I regret having done that now.
—Who do you think will get the first prize? —Mary, of course. She ________ for the competition for months.
—Who do you think will get the first prize?
—Mary, of course. She ________ for the competition for months.
All his time _______research on Chinese history, he has no time for outdoor activities.
—How long do you think it will be _______ we get the loan?—Perhaps two or three months.
Hardly had she heard the sad news that her son lost her job when she_____crying.