it one that 指代问题~...不是很懂

xdai555

Between 1990 and 2000 theglobal economy grew more than it did during the 10,000 years from the beginningof agriculture to1950.
A.Between 1990 and 2000 the global economy grew more than it did during the10,000 years from the beginning of agriculture （it 指代1990的eco did - grew）
B.Between 1990 and 2000 the growth of the global economy was more than that during 10,000 years, from when agriculture began (是不是因为 growth 应该用 greater ??? )
C.The growth of the global economy between 1990and 2000 exceeds that which had been for 10,000 years from the beginning ofagriculture
D.The growth of the global economy between 1990 and 2000 exceeds what it has been for 10,000 years, from when agriculture began (要用也应该用 had been 是吗？ 我1开始错选D)
E.The growth of the global economy between 1990 and 2000 exceeded what it didfor the 10,000 years from the beginning of agriculture
A  其实我真不知道B 为什么错  还有 from when agriculture began 和 from the beginning of agriculture 这里有错吗`~



8. Today’s technologyallows manufacturers to make small cars more fuel-efficientnow than at any time in their production history.
(A) small cars more fuel-efficient now than at anytime in their  （其实我最喜欢A 状语对比 不需要补出 但是Now 和today 多余）
(B) small cars that are more fuel-efficient than they were at any time in their （were 补出时态不一致 但是they 指代同名同物 所以不合理）
(C) small cars that are more fuel-efficient than those at any other time in （those 指代同名异物。对~）
(D) more fuel-efficient small cars than those atany other time in their
(E) more fuel-efficient small cars now than at anytime in
C  (B 这题用tjey 指代的就是 today's car 又不对？？  而且事态不一致 补出时态 有什么问题)


怎么双重标准啊 第一题的it 就能用 第二题的they 就指代错误 不懂~ 。。。 one/that指代同名异物   it同名同物   谢谢~~