不懂这题的逻辑，求解！ Kernland imposes a high tariff on the export of unprocessed cashew nuts in order to ensure that the nuts are sold to domestic processing plants. If the tariff were lifted and unprocessed cashews were sold at world market prices, more farmers could profit by growing cashews. However, since all the processing plants are in urban areas, removing the tariff would seriously hamper the government’s effort to reduce urban unemployment over the next five years. Which of the following, if true, most seriously weakens the argument? A. Some of the by-products of processing cashews are used for manufacturing paints and plastics. B. Other countries in which cashews are processed subsidize their processing plants C. More people in Kernland are engaged in farming cashews than in processing them. D. Buying unprocessed cashews at lower than world market prices enables cashew processors in Kernland to sell processed nuts at competitive prices. E. A lack of profitable crops is driving an increasing number of small farmers in Kernland off their land and into the cities.

请问这道题c选项为什么不能用过去完成式？之前的“had installed”不也是过去完成式吗...怎么判断什么时候用过去完成时什么时候用现在完成时什么时间用一般过去时啊？

请问这道题e选项“that”表示了什么？

请问在这道题里面 to do和doing的区别是什么？

请问这道题为什么不可以用过去完成时？“its trunk”里面的its会不会被当成是aquatic animal而不是大象？“with”之后是不可以接整句吗？

请问这道题b、c为什么不对

请问这道题e选项错在哪里？

请问这道题为什么不能选e？

请问为什么c不对？that of是什么意思？

请问in which 和 where的区别是什么？哪个能指代抽象地点，哪个是实际地点？

D选项错的原因之一是说不应该用that they participate 请问这个错在哪里了？