1 . Those _________________ the Ebola virus should be kept separated from others.(infect)
感染埃博拉病毒的患者应该被隔离。

2 . The composer ____________（感染了） terrible bacteria and soon died. (根据汉语提示完成句子)

3 . 如果伤口继续暴露在外面，它就会感染的。(根据汉语提示完成句子)
If the wound remained ____________, it will get ____________.

4 . Most people who’ve had chicken pox(水痘)once are _____it for the rest of their lives.

A．free from

B．immune to

C．concerned about

D．infected with