The number of students are playing football on the playground（）.

A:The B:students C:playing D:on

The number of students are playing football on the playground（）.

A:The B:students C:playing D:on

The number of students are playing football on the playground（）.

A:The B:students C:playing D:on

The number of students are playing football on the playground（）.

A:The B:students C:playing D:on

The number of students are playing football on the playground（）.

A:The B:students C:playing D:on