There is____with my computer. Can you help me mend(修理) it?
— Why did you persuade me _____ that dress? — Because I think it’s suitable for you.
Keep on going and never ___, and then you will succeed.
I remember seeing the man in the street last week.
— It’s ____ cold. Would you please close all the windows? — OK. I’ll do it now.
Walking up and down the stairs is a good kind of exercise to stay _____.