----Are Mr. and Mrs. Wang living alone in the house? ----Yes, altough they have three sons,      of them live with their parents.

With       help, we finished our work on time.

 Is this  _______bike? No.________ is over there.

—__________ have you been in the sports club?—Since the first month I came to the school．

 _________ are good friends. We often play together.