Many teenagers say that _____ they have a lot of friends, they really have no best friend.

____ she goes, there are crowds of people waiting to see her.

She thought I was praising her son, _____ as a matter of fact, I was scolding him for his bad behavior at school.

 I was on the point of going to bed ________ Mr. Zhang rang me up.

      I noticed the puzzled look on his face, I realized that he didn’t understand me.