some questiona about PP2－34 119！！

gerry0601

34. The covered wagons known as Conestogas were primarily used _________ of freight across the prairies of the United States.

A. heavy loads were carried

B. to carry heavy loads

C. the carrying of heavy loads

D. in heavy loads carrying

答案是B，我觉得好像D也不错啊！！

119， Although copper was hammered into tools and ornaments by some early inhabitants of North America, the smelting and casting of copper were unknown between them.

上面这题为什么选D呢？？  

[此贴子已经被作者于2005-9-21 7:08:50编辑过]

liweimi1987

be used to 固定句型

them 指代的是some early inhabitants of North America。肯定是大于2人，不between 只用于两人之间，这里应该用among

gerry0601

收到，谢谢

不是还有一点疑问：

be used in这个结构也有的吧！？

pamela111

be used to do sth和be used in doing sth都是可以的，如果D选项是in carrying heavy loads还差不多。

farsuccess

be used to do sth和be used in doing sth都是可以的，如果D选项是in carrying heavy loads还差不多

Sure