GRE Text Completion Question 3811
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Source: Cracking
Since a large number of the ores frequently located in riverbeds are (i)_____on the earth's surface, where the processing of chemicals is less costly, recovery of underwater ores is not likely to become a (ii)_____procedure.
| Blank(i) | Blank(ii) |
|---|---|
| A scanty | D valuable |
| B abundant | E cost-effective |
| C preserved | F rejected |