（2014重庆）In Chongqing，you can often see many people dance outside together if it________in the evening．

I ______ sooner but I didn’t know that they were waiting for me.

There _______a river in front of my house.

To their surprise, they found the lecture given by the famous professor easy ______.

Is there anything wrong , Bob ? You look sad .Oh ,nothing much In fact , I of my friends back home