—Your MP3 is so nice. How much is it?

—It _____ me $300. [ ]

A. bought

B. spent

C. cost

D. paid

关于妊娠合并淋菌感染的说法，下列哪项是不恰当的

A．妊娠早期可致感染性流产

B．易发生胎儿宫内感染

C．对可疑感染者取分泌物培养可确诊

D．治疗首选喹诺酮类药物

E．淋病高发区孕妇产前常规筛查淋菌