Listening to peaceful music.  as well as taking exercise,___________ a lot in relieving people 's sad emotions.

Above one third of the population in Beijing and Shanghai      netizens, but in poorareas, only three or four percent        online.

Large quantities of polluted water_____ into the sea so that lots of fish died. 

It was reported that six  _____ including a boy.

The father as well as his three children       skating on the frozen river every Sunday afternoon in winter .