There _____ an eraser, two books and three pens on the desk.
In order to let more people pay attention to their plan, they _________ some signs on the wall.
—Look out! Don’t run the red light when crossing the road next time.—_______________.
To solve the traffic problem, more and more bridges ____________ across the river every year.
Be quick! Jim _______________ for us downstairs.
—How long have you __________ this book?—About thirteen days.