________ with her work, she didn't even notice the heavy snowfall outside the window.
— Why do you do volunteer work in the North—West?— I_____ to improve the lives of the children there through my efforts.
I send you my revised catalogue and price list, ______ you may find something that suits you.
Under the new schedule, teachers of primary and secondary schools must _____each class on time instead of adding extra lessons.
—Hi, Tom. The new iPad6 only cost me 150 dollars.—Really? It was a real ______.
Appointed as ____chairman to China, Mr. Xi was determined to serve his country____ heart and soul.