________ the global economy is showing signs of recovery, many developing countries are still suffering.
—When will you come to see me, Dad? —I will go to see you when you __________ the training course.
—You've left the light on. —Oh, so I have. __________ and turn it off.
He was about to tell me the secret __________ someone patted him on the shoulder.
In the near future, more advances in the robot technology __________ by scientists.
—When __________ again? —When she __________, I'll let you know.