[求助]两道题求解释，谢谢！

freedownload

1.                             The golden crab of the Gulf of Mexico has not been fished commercially in great numbers, primarily on account of living at great depths—2,500 to 3,000 feet down.

(A) on account of living

(B) on account of their living

(C) because it lives

(D) because of living（C）

(E) because they live

能解释一下选项A,B,D都错在什么地方吗？

2.                             While Jackie Robinson was a Brooklyn Dodger, his courage in the face of physical threats and verbal attacks was not unlike that of Rosa Parks, who refused to move to the back of a bus in Montgomery, Alabama.

(A) not unlike that of Rosa Parks, who refused

(B) not unlike Rosa Parks, who refused

(C) like Rosa Parks and her refusal

(D) like that of Rosa Parks for refusing（A）

(E) as that of Rosa Parks, who refused

能解释一下这道题为什么选A吗？not unlike为什么不用like是一种什么现象？

谢谢！

ca3ltoys

1.(A) (D)不知谁living.(B)(E)中单复数不对应,因为前面是 crab.

2.(B)(C)少that of ,变成courage was not unlike Rosa Parks,不通.(E)中as用法不对,(D)中for refusing改变句子意思,变成Jackie Robinson refused 而不是Rosa Parks refused.

    

weiyu

Another point might be missing by ca3ltoys. not unlike implies an accent tone. The right choice should make effort to remain it.