GMATPrep兩道題，求助

1. Shipwrecks are more likely to be found undisturbed at
great depths than in shallow coastal waters, which exposes archaeological
remains to turbulence and makes them accessible to anyone in scuba gear,
whether they be archaeologist, treasure hunter, or sport diver.

1. than
        in shallow coastal waters, which exposes archaeological remains to
        turbulence and makes them accessible to anyone in scuba gear, whether they
        be

2. than
        in shallow coastal waters, where archaeological remains are exposed to
        turbulence and are accessible to anyone in scuba gear, whether

3. as
        opposed to shallow waters along the coast, where archaeological remains
        are exposed to turbulence and accessible to anyone in scuba, including

4. instead
        of in shallow waters along the coast, which exposes archaeological remains
        to turbulence and making them accessible to anyone in scuba gear,
        including an

5. instead
        of shallow coastal waters, because it exposes archaeological remains to
        turbulence and makes them accessible to anyone in scuba gear, whether

正確答案為B

Whether後頭可以直接加名詞嗎？這裡的whether是作”不論哪一個”解嗎？

2. A new genetically engineered papaya was produced not
by seed companies who have been motivated by profit, which was the case with
most genetically modified crops previously approved for commercial use, but university
and United States Department of Agriculture researchers who allowed growers to
use it free of charge.

1. produced
        not by seed companies who have been motivated by profit, which was the
        case with most genetically modified crops previously approved for commercial
        use, but

2. produced
        not by profit-motivated seed companies, the case with most genetically
        modified crops previously approved for commercial use, but

3. produced
        not by profit-motivated seed companies, as was the case with most
        genetically modified crops previously approved for commercial use, but by

4. not
        produced by seed companies who have been motivated by profit, the case
        with most genetically modified crops previously approved for commercial
        use, but by

5. not
        produced by seed companies who have been motivated by profit, the case
        with most genetically modified crops previously approved for commercial
        use, but by

正確答案為C

我用刪去法解出這一題，但對於as
was the case with most genetically modified crops previously approved for
commercial use這一句的文法不太懂，究竟這as
在此處是何作用？