[求助]大全SD-6,7

SD-6.     The main reasons for the phenomenal growth of agribusiness over the last fifteen years are because of elevated land prices, the basing of retail marketing networks on produce imported from other states, and decreased competition from developers.

(A) because of elevated land prices, the basing of retail marketing networks

(B) a result of elevated land prices, retail marketing networks based

(C) that land prices are elevated, retail marketing networks are based

(D) elevated land prices, retail marketing networks based

(E) because land prices are elevated, the basing of retail marketing networks

答案是D,我选了C.

在LZM语法书上貌似说过宾语从句一定不能省that的哦（除非我真的记错了），那为什么不选C而是D呢？

7.     Everyone participating in the early sociological study committed a crucial methodological error by failing to fully consider alternative ways of classifying their data.

(A) by failing to fully consider alternative ways of classifying their

(B) by failing fully to consider alternative ways of classifying their

(C) they failed to consider alternative ways to classify their

(D) by not fully considering alternative ways to classify the

(E) by not considering fully alternative ways of classifying his or her

答案是D，我选了B。这个题目不太明白怎么选的，能不能帮我把A,B,D,E解释一下？

SD-1 不是宾从，是宾语，平行对称

SD-2　their 和 his or her都不对

7.     Everyone participating in the early sociological study committed a crucial methodological error by failing to fully consider alternative ways of classifying their data.

(A) by failing to fully consider alternative ways of classifying their

(B) by failing fully to consider alternative ways of classifying their

(C) they failed to consider alternative ways to classify their

(D) by not fully considering alternative ways to classify the

(E) by not considering fully alternative ways of classifying his or her

答案是D，我选了B。这个题目不太明白怎么选的，能不能帮我把A,B,D,E解释一下？

我觉得their明显不对，因为everyone 做是单数。我觉得口语里面可以说，his or her,。但是书面上正式英语我就不太清楚了。但是这道题后面明显是考表示目的的动作，应该用to classify, 而不是of classifying,动名词结构无法表达目的的意思。