When ____ stress,we react both chemically and physically.[A.expos_英语解答

When ____ stress,we react both chemically and physically.[A.exposing to B.exposed to]
And reason,please.Thanks.

人气：275 ℃　时间：2020-05-01 08:35:26

解答

B
省略了we are
完整的应该是when we are exposed to stress
或者说.
expose在这里应该用被动语态