Look ! _________ students are doing morning exercises on the playground .

Scientists think that there has been life on Earth for _______ years.       

—How many members are there in the English Drama Club?—　　　　 the members is twenty, 　　　　 of them are girls.

 --- Can you tell us what to do next, Miss White?--- Please turn to Page _____ and look at the _____ picture.

                  of the students in my school are girls.