A.costless
B.priceless
C.valueless
D.Worthless
A.worth roughly$350,000
B.possessed by a local resident
C.unearthed about 500 years ago
D.left by a merchant during a war
A.He produces metal detectors.
B.He owns a manufacturing firm.
C.He works for the British Museum.
D.He seeks buried treasure as a hobby.
A.are rewarded for whatever they find
B.are forced to obey tough regulations
C.may keep what they have discovered
D.should report whatever they discover