Prep几题，证明下你是对的！恳请NN们帮忙！

（1）178. Last week local shrimpers held a news conference to take some credit for the resurgence of the rare Kemp's ridley turtle, saying that their compliance with laws requiring that turtle-excluder devices be on shrimp nets protect adult sea turtles.

A. requiring that turtle-excluder devices be on shrimp nets protect

B. requiring turtle-excluder devices on shrimp nets is protecting

C. that require turtle-excluder devices on shrimp nets protect

D. to require turtle-excluder devices on shrimp nets are protecting

E. to require turtle-excluder devices on shrimp nets is protecting

答案选B。我不太明白，后面为什么要用is protecting。

A. as much as that which is being emitted annually by all

B. as much annually as is emitted by the

C. as much compared to what is annually emitted by all

D. that emitted annually by all
                

E. that emitted annually compared to the

答案是D。我不太明白为什么不选B，能讲一讲倍数twice的用法吗？

还有此题也不是很懂！

B.       except in

C.      but except in

D.      but excepting for

E.       with the exception of

想问下这是固定用法吗？

C.      a single ancestor whom it is thought had lived

D.      the Y chromosome of a single ancestor who is thought to have lived

E.       the Y chromosome of a single ancestor whom it was thought had lived

答案是D，此题为什么不选B啊？

235. A mixture of poems and short fiction, Jean Toomer's Cane has been called one of the three best novels ever written by Black Americans—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man

A. Black Americans—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man

B. Black Americans—including Native Son by Richard Wright and Invisible Man by Ralph Ellison

C. a Black American—including Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man

D. a Black American—the others being Richard Wright, author of Native Son, and Ralph Ellison, author of Invisible Man

E. a Black American—the others being Richard Wright's Native Son and Ralph Ellison's Invisible Man

此题为什么选E，being在这里怎么解释。C错在哪儿？

去看讨论帖啦。http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=381526