SC两题，求教

ffice:smarttags" />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.fficeffice" />

    (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，D为什么不对呢？主动应该是优于被动啊。

The Forbidden City in Beijing, from which the emperors ruled by heavenly mandate, was a site which a commoner or foreigner could not enter without any permission, on pain of death.    

(A) which a commoner or foreigner could not enter without any permission,

(B) which a commoner or foreigner could enter without any permission only    

(C) which no commoner or foreigner could enter without permission.

(D) which, without permission, neither commoner or foreigner could only enter,

(E) which, to enter without permission, neither commoner or foreigner could do.

答案是C，但意思似乎不对：不经过允许没有普通平民或者外国人能够进入紫禁城, on pain of death；我选的是B：不经过允许，普通平民或者外国人能够进入紫禁城只会, on pain of death

Who could make an explanation? Thank you very much.