While         the book on the top shelf , you need to be very careful .

The teacher together with the students ________ discussing Reading Skills that ________ newly published in America.

 Many a student _____ playing games on the playground and only one girl or two _____ reading in the classroom. 

 In that train accident, _____ who were killed was more than 2000.

---How old ________ you?---I ______ ten years old.