My sister would rather ______ at home reading books than ______ on National Day. [ ]

A. to stay; to travel

B. stay; travel

C. stay; traveling

D. stayed; traveled

眼内异物对视力的威胁主要有以下哪些因素()

A．机械性破坏组织结构

B．增加交感性眼炎的发生率

C．增加眼内感染机会

D．引起组织炎症反应

E．以上均是