________warm atmosphere in our English class has left________deep impression on all the people present.
Life isn’t meant to be easy and you have to _______ some pain to 1earn the skills to move forward.
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.