Mr Smith________his living by teaching ten years ago and he________greatly from his work. [ ]

下列各组对话中，语言表达得体的一项是 ( )

Pay as much attention to the things that are workingpositively in your life as you do to ______ giving you trouble.

is a successful year for us China.— ___________, and ________.

________ that he managed to get the information?—Oh, a friend of his helped him.[ ]