1.Men and women leave the village before sunrise to hike four miles up steep,precarious trails to the forests,to be returning by late afternoon with 70-pound loads of firewood on their backs.
答案说应该将“forests,to be returning by late afternoon”改为“forests and return by late afternoon”,为什么呢?我觉得应该在forests后面加一个逗号,改为“forests ,and return by late afternoon”,因为认为“precarious trails to the forests”是作“four miles up steep”的同位语,
还有为什么将“forests,to be returning by late afternoon”改为“forests,and it is late afternoon that they return”不对呢?
2.this可以指代前面所说的一件事吗?还是this后面必须要有名词?希望可以举例说明!
3.Buffalo herd,which once thrived in the Great Plains of North America,trampled vegetation,but this aided future plant growth and nutrients were returned.
答案说应该将“but this aided future plant growth and nutrients were returned.”改为“thereby aiding future plant growth by returning nutrients.”为什么呢?
另外,this不可以指代前面所提到的事吗?
3.In the novel,Jane Eyre must make difficult choices,like when she foreces herself to leave the house of Mr.Rochester,the married man she love.
答案说将“like when she foreces”改为“including forcing”,可是根据语法“Subject+ Verb+ Object ,doing” 中的“doing”应该修饰主语subject“Jane Eyre”,而“subject +verb+object doing”中的doing才修饰宾语object“choices”,逗号的有无原因,所以我觉得应该去掉“choices”后面的逗号,请问为什么不对呢?
可以讲讲在举例时like,such as 和for example的区别吗?
4.Nicknamed the supergrain of the future,quinoa is a complete protein,one that contains all the necessary amino acids and is high in fiber.
请问one是作protein的同位语吗?