单项选择题A love marriage does not necessarily ______ much sharing of interests and responsibilities.
单项选择题I m not sure whether I can gain any profit from the investment, so I can t make a(n) ______ promise to help you.
单项选择题The sports meeting, originally due to be held last Friday, was finally ______ because of the bad weather.
单项选择题It is quite necessary for a qualified teacher to have good manners and ______ knowledge.