They desired that they___ the right to vote。
One can’t do extreme sports _________ he or she has had some training.
--David, are you 1istening to me? --Sorry, Dad. I _______ to make sense of what the reporter said.
The road construction is based on the agreement, one of _______ purposes is to ensure its completion on time.
Many approaches have been _______ to control the spread of H7N9 Bird Flu.
–Carla _______ go to that historical museum after school when she was a teenager. --No wonder she is so familiar with it.