—Why ! Where's my passport? Maybe I left it on the plane． --My Goodness ! You ____________ things behind．

With the development of modern society, E-mail as well as telephones         an important part in daily communication.

I called Hannah three times yesterday evening, but I couldn’t get through, her brother _______on the phone all the time.

--Hi, Tracy, you look tired.--I am tired. I__________ the living-room all day.

She stared at the painting,wonder where she ____it.