Tom is tall, but his sisters, Mary and Kathy,       short.

-_______ do you read English books?- Three or four times a week.

——How often do you go skating?——________.I can’t skate at all.

---I can’t find my pen. ---___ you put it in your book.

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