Did you have any trouble ____ the post office?
I don’t know ______ tomorrow. Can you tell me?
A large number of students in our school ____ from the countryside; the number _____ growing these years.
According to the present economical ______, it is important to safeguard the regional growth and stability.
—I’m ______ happy to take you there in my car.—You are so nice. Thank you.
Every minute has been made full ______ of by the girls ______ knowledge about etiquette(礼仪).