For a moment nothing happened. Then ________ all shouting together.[ ]

A. voices had come  

B. came voices

C. voices would come  

D. did voices come

IUD异位的原因（）。

A.术时子宫穿孔，将IUD放入子宫外

B.节育器过大逐渐嵌入子宫肌层

C.T型IUD下移、变形，宽大的横臂嵌入子宫下段或宫颈

D.子宫畸形