有3道语法题请各位指教,望大家解答,谢谢!!

zhanghanbingUID: 2155534

1.In 1850 Jim Beckwourth,a black american explorer, A(discovered) B(in the) mountains of the Sierra Nevada a pass C(soon becoming) an important D(gateway to) California gold-rush country.
/ X3 L+ q. T, B; g答案是C,请问应该如何改正那?
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2.The dolls in the collection,A(all) B(more than) two hundered years old,had been C(carefully) carved for childern D(long since) gone.
答案是E.  请问long since gone 是固定搭配吗?

3.Some of the workers A(who resent) the supervisor's authority B(would probably) feel uncomfortable C(if) they were to acquire the indepence that D(they demand)
' M- V/ J9 j# B0 \' e% A  X4 ~: R+ b7 O答案是没有错误.  请问全句的时态都是过去时,但A与D定语从句却是现在时,这是怎么回事?

9 s$ P# O, C' ?! d" o; ~十分感谢!!
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[ 本帖最后由 zhanghanbing 于 2006-9-27 23:08 编辑 ]

dingyu19860324UID: 204706

1 becoming和discovered要时态一致。
2 正确答案是E。你答案错了。
& Z8 O) x$ J+ q: N3 从句内部一致即可。
你为什么不肯说第 1，2题 来源是OG第5套第4个section？