Companies are struggling to find the right _____between supply and demand, but it is no easy work .
In part of China, some people still have difficulty gaining to social services.
Out of for the poor children, the rich man gave them some money and food.
My father told me a story that ________ European woman helped him a lot when he was in America in ________ 1970s.
— Could I ask you a rather personal question? — Sure,________.
— I’m sorry. I’ve forgotten my credit card. And I don’t have enough money for the meal. — Don’t worry. ________.