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题库 / GMATAdvanced-SC-3
It may someday be worthwhile to try to recover uranium from seawater, but at present this process is prohibitively expensive.
It may someday be worthwhile to try to recover uranium from seawater
Someday, it may be worthwhile to try and recover uranium from seawater
Trying to recover uranium out of seawater may someday be worthwhile
To try for the recovery of uranium out of seawater may someday be worthwhile
Recovering uranium from seawater may be worthwhile to try to do someday
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1. idioms: try to do. b中try and recover逻辑上不平行，try uranium?不对，排除b。d中try for也不对，排除d
2. idioms: recover from. not "recover out of",排除c/d
剩下a/e, e中worthwhile to try就可以了，后面的to do有点redundant. sth may be worthwhile to try. try后面的宾语又是该句的主语，这就变成了“sth may be worthwhile to try sth“--> redundant.
最后剩下a.
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