One way for students to prevent H7N9 flu virus is to open the windows of the classroom to allow the air to ________.
Will you see to that my birds are well looked after while I am away?
--What does the model plane look like? --Well, the wings of the plane are _____ of its body.
--Have you seen Bob recently? --No, but I was told he _______ for a new job all through the summer.
-- Why isn't Cathy here yet? -- She to be picked up at the station.
I have no dreams to have a happy life.