It is difficult for any of us to eat better, exercise more, and sleep enough,________ we know we should.
With all the family members ______ on vacation without him, the boy felt extremely lonely and afraid.
It is not when to start the job but who to start ______is of importance.
A government official was murdered last Friday and the police are collecting information that is________to the case.
---I’m sorry to keep you waiting for so long, I’ll shorten the working time.--- ________. I’m not in a hurry.
He’s aiming ________a prize. That is why he puts his heart ________ his work.