Trees ________ every year to make our city greener.

Paul doesn’t have to be made  _______ . He always works hard.

--- It’s difficult for the village children to cross the river for school. --- I think a bridge ________ over the river. 

—Our school _________ in 1876. —Wow, it has a very long history.

－Did the doctors save the old man？－Yes. He _______ on the morning of May 10th. And now he is out of danger.