. Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

A. exposed        B. threatened      C. constructed      D. conserved

Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

1. A.
   exposed
2. B.
   threatened
3. C.
   constructed
4. D.
   conserved

. Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

A. exposed        B. threatened      C. constructed      D. conserved

Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.