—Our school _____ in 1892. —It has a very long history.
I think ____necessary for us _____the birds.
Parents ______ good conditions(条件) _______ us. We should be grateful(感激的)to them.
I have _____ useful dictionary. Do you have ______?
About seventy percent of our earth _______ by water.
Don’t worry about your boy. His temperature will ______ back to normal(正常)if he takes this medicine.