Nowadays the roles of husband and wife are not as defined as before, especially when both partners work and earn money for the family.
Generally speaking, the publishers will send you a specimen copy of their new books when ________.
Using bicycles ______ greatly to people’s physical fitness as well as easing traffic jams.
I stopped and said hello to her when I saw her but she _____ me completely and walked on.
It has been proved _______ violence on television has a bad effect on children.
Mr Smith suggested the problem worth paying attention to ________ at the meeting.