单项选择题
W: We have made ten copies. M: At first it’s planned to need ten copies, and now we don’t need so many. Four would be enough.
A．Five. B．Three. C．Four. D．Six.
A．Cheese is one of the most general foods in the world. B．Cheese has hundreds of different shapes, sizes, flavors. C．Enjoyed, with butter, cheese is a delicious food. D．Cheese is a concentrated source of almost all the valuable nutrients.