What _______ the number of the students in your school—About two thousand. A number of them _______ from the countryside.

The villagers who suffered flood are____________food and clothes.[ ]

The ____ of some wild animals reminds us __ theproblems on environment.

Rock- climbing is a breathtaking sport，courage plays an important role.

Must we clean the classroom now—-No, you _________. It _________ after school.