逻辑只记得有一个：
dirham（一种middle east 硬币）在S site发现，说明了middle east 和S之间有trade。然后说在empire C没有发现这个硬币，但是不能说明middle east和empire C之间没有trade。问为什么，选的是empire C和外国交易的时候都用自己的coin，会把其他国家的coin融化掉制造自己的货币。
语法好难。只记得一个，纠结于两个选项：大概意思是 the proposal that xxx to apply new resticons on both diesel oil and diesel engine has raised the objection from oil industry, saying balabala. 另一个是： the proposal that xxx to apply new resticons on both diesel oil and diesel engine has raised the objection from oil industry, which saysbalabala. 我选的是saying，现在突然发现好像应该是which says，因为印象中V-ing做状语要么修饰前面句子，要么修饰前面句子的主语，而这个显然是要修饰oil industry。当时没选which says是觉得which says有点奇怪，who says听起来更顺口，不过who又不能修饰industry。希望语法君帮忙看一下。