I don’t know how to begin a talk with Betty. She can sit all day long ______ a word. [ ]

_________ very important for her to work hard in all her subjects.

_______ useful tool the computer is!— I agree. It’s ________ interesting as well.

The teaching building has five floors. My classroom is ________ the third floor. [ ]

Now the government is trying to solve the problem the school bus safety. — So we believethere will be fewer accidents in future.