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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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B项 try 和recover不应该是and连接的平行关系，应该是try to recover
C项 recover A from B是固定搭配，不能换成out of
D项 try后面不与for搭配
E项 to do 多余
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