Most companies’ marketing effort is focused on getting customers, with little attention _______ to keeping them.
. I think that this film is _______ a film, it is also a good material for education.
I don’t want to read all these old newspapers, please tell me where the __ ones are.
---- How did her family feel when you visited them? ---- My coming ________ the happiness of her family.
_________ to 100℃, water will boil.
He __________ his aunt’s when he went to Wuhan on business.