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. 
#72684
A
exposed
B
threatened
C
constructed
D
conserved
推荐题目
John was ________to learn the news      he was rejected by the committee.
#72949
A
cast down; that
B
cast off; whether
C
cast about; that
D
cast away; whether
Mr. Robert is ________ our teacher. He is also our friend.
#66846
A
no more than
B
less than
C
more than
D
no less than
Take an umbrella to ______you from the rain, which may ___you from taking a walk.
#73155
A
protect; stop
B
protect; protect
C
prevent; protect
D
prevent; keep