请问一题

老螃蟹

12.    Alaska regularly deposits some of its profits from the sale of oil into a special fund, with the intention to sustain the state’s economy after the exhaustion of its oil reserves.
(A) fund, with the intention to sustain the state’s economy after the exhaustion of its oil reserves
(B) fund, the intention of which is to sustain the state’s economy after they have exhausted their oil reserves
(C) fund intended to sustain the state’s economy after oil reserves are exhausted
(D) fund intended to sustain the state’s economy after exhausting its oil reserves
(E) fund that they intend to sustain the state’s economy after oil reserves are exhausted
答案是c，请问intended修饰什么？

老螃蟹

20.    Byron possessed powers of observation that would have made him a great anthropologist and that makes his letters as a group the rival of the best novels of the time.
(A) makes his letters as a group the rival of
(B) makes his letters as a group one to rival
(C) makes his letters a group rivaling
(D) make his letters as a group the rival of
(E) make his letters a group which is the rival of
答案是d，我想问a group the rival of是个什么用法?groud不是a group of吗

老螃蟹

26.    Once common throughout the Western plains, black-footed ferrets are thought to have declined in number as a result of the poisoning of prairie dogs, their prey.
(A) black-footed ferrets are thought to have declined in number as
(B) it is thought that the decline in number of black-footed ferrets is
(C) the decline in the number of black-footed ferrets is thought of as
(D) that black-footed ferrets have declined in their numbers is thought to be
(E) the numbers of the black-footed ferret are thought to have declined as
我选了b，不明白a

dullpen

intend 修饰fund,参考longman词典的例句：

1、be intended for somebody/something
to be provided or designed for a particular purpose or person
The book is intended for children aged 5-7.

2、  intended target/victim/destination etc
the person, thing, result etc that an action is intended to affect or reach
It seems likely that General Rogers was the killer's intended victim.

dullpen

20：make his letters as a group the rival of
make his his letters the rival of ...as a group这样理解。as a group是个状语

dullpen

26、b罗嗦。参考885sc 207题
Geologists believe that the Bering land bridge, over which human beings are thought to have first entered the Americans, disappeared about 14,000 years ago when massive glaciers melted and caused the sea level to rise several hundred feet worldwide.
(A) are thought to have first entered （key)
(B) were thought first to enter
(C) were thought at first to enter
(D) are thought of as first entering
(E) were thought to first enter