All the staff in our company are considering       to the city centre for the fashion show.[ ]

A. to go          

B. going    

C. to have gone      

D. having gone

甲状腺功能亢进患者术前药物准备中，既能抑制甲状腺素的释放，又能减少甲状腺血运，使腺体缩小变硬的药物是硫脲类药物。