It's dangerous to be ________ to the virus without any protection.
A. exposing B. covered C. affected D. exposed
It's dangerous to be ________ to the virus without any protection.
A. exposing B. covered C. affected D. exposed
D
【解析】句意：不加任何防护暴露在这种病毒下是危险的。be exposed to“暴露在……下；置于……危险中”。