Be careful when you deal with this chemi
题型:选择题
问题:
Be careful when you deal with this chemical, as it will explode when ______ to sunlight.
A.exposed
B.to expose
C.exposing
D.being exposed
Be careful when you deal with this chemical, as it will explode when ______ to sunlight.
A.exposed
B.to expose
C.exposing
D.being exposed