问题
选择题
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
答案
答案：A
题目分析：考查非谓语动词。本题考查短语be exposed to暴露与……。句意：处理这种化学物质时要小心，因为它暴露在阳光下时会爆炸。故A正确。