来自田领红的问题
Theyoftenplayping-pongonweekends.（对playping-pong提问）为什么要写theyoftendoonweekendsTheyoftenplayping-pongonweekends.（对playping-pong提问）为什么要写whatdotheyoftendoonweekends
Theyoftenplayping-pongonweekends.（对playping-pong提问）为什么要写theyoftendoonweekends
Theyoftenplayping-pongonweekends.（对playping-pong提问）为什么要写whatdotheyoftendoonweekends
