肠线主要用于缝合（）

A.皮肤

B.肌肉

C.骨

D.子宫

E.筋膜

Halloween is believed to be a day ______all the spirits come back to the world of the living, and we have the same day in China called “Guijie", the Day of Dead.

A．where

B．when

C．which

D．that