题目

The woman sold the eggs _____ seven dollars and they were sold ____ half price.A. with; atB. for; atC. at; inD. by; on   答案：B  sell sth. for money卖…得了多少钱；; sell sth. at the price以…价格卖….  5304里面有（____）个千、（____）个百和（____）个一； 6007里面有（____）个千和（____）个一； 7400中的4表示（____）个（____）。