It’s nice to see you again. What_________since we last met

Market economy is a competitive economy, _________ I think, suppliers, producers and dealers should obey market rules and develop cooperative relation based on mutual benefits.

If we are not _______ the progress we have made, we will have greater success.

Only when he started to explainthe reason for this.[ ]

_______ you write or tell stories—I’m good at writing stories, though I’m not so good at telling them.