Question

请教SAT语法问题！

1. Buffalo herd, which once thrived in the Great Plains of North America, trampled vegetation, but this aided future plant growth and nutrients were returned. " but this aided future plant growth and nutrients were returned. "这句话错误的原因是不是因为this不能指代前面那件事（这里的this无适合名词可指代），对吗 ？应该改为“this action” ，对吗？2.a. In the novel, Jane Eyre must make difficult choices, including forcing herself to leave the house of Mr.Rochester,the married man she love.b. Every year, toy manufacturers gather groups of children into playrooms, observing their choices of toys and predicting which new products will becomethe most popular.a句中的“including”修饰宾语“choice”，而b句中的“observing"修饰主语“manufacturers”，两个句子结构相同，为什么句中的doing一个修饰宾语，一个修饰主语呢？谢谢了！

Answer 1

Buffalo herd, which once thrived in the Great Plains of North America, trampled vegetation, but also aided future plant growth and nutrients were returned. 第二句中修饰哪个要看句子意思。动名词做定语可修饰各种，要具体情况具体分析。

Answer 2

1.this确实不能指代前面那件事，改为“this action”或“this activity"不如改为that好 ，that常用来指代前面提到的内容。2. including 在此处的用法往往是和included比较的，两者都是介词，不做doing解释。 observing可以改成and observe，和前面的gather成并列谓语，表示两动作不分主次。如果用 observing，即doing，则表示此动作引导的行为是gather 行为的伴随行为。 O(∩_∩)O 采纳为盼