With the help of the smart phones, you ____ video chat with your friends on the phone.

ou receive the letter the next day—No. Somehow, it was three weeks ________ I receivedit.

The foreigner does speak Chinese well, but of course not _____ we Chinese

Tom is coming by_______train tomorrow. —Let’s go to_____station to meet him.

The detective, _______to read a newspaper, glanced at the man _____ next to a woman.