They share with each other the informationfrom the Internet[ ]

I hear someone _______at the door. Please go and see who _______ is.

The drug can’t cure your disease at all. It can provide only relief from pain.

What else do you want to know about the cell phone? — _______ it can be used as a digital cameraYou know, I’m into photography

After arriving in the United Sates, this 20-year-old Chinese student found it rather difficult to ____ living on his own.