Question

Many experts agree that once these treasures are _______ to

Answer 1

A

词义辨析。Exposed暴露；threatened威胁；constructed建设；conserved

保护，保存。句意：许多专家同意一旦这些宝藏暴露于空气中，会对他们造成很大的伤害。所以他们认为最好不发掘这些宝藏。所以选A。