I often see my teacher, Ms Zhao, ________ books in her office.

Helen always helps her mother even though going to school____ most of her day.

iversity estimates that living expenses forinternational students ________ around $8,450 a year, which ________ a burden for some of them.

)—Excuse me.________ is the park—It’s on the Center Street.

Was it because of the heavysnowstorm in Europe _______ the flight had to be put off