It is reported that nearly foreign kids joined a British boarding school last year, and a third of them came from China.

_____ of the water _____ polluted. We must try to protect our environment.

Why does Sara know so much about Angkor Wat?—She _______ there,or she may have read about it.

_____ is the orange —Orange.

Some wild animals _____ and killed at such a speed that they will disappear from the earth in the near future