8.7 go on doing/to do
 
go on to do 做了一件事后,接着做另一件事。
go on doing  继续做原来做的事。
  After he had finished his maths,he went on to do his physics.
  做完数学后,他接着去做物理。
  Go on doing the other exercise after you have finished this one.
  作完这个练习后,接着做其他的练习