Who did the teacher have ___ an article for the wall newspaper just now?
The sleeping baby would be scared _______ a sudden loud noise.
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.