求助og12 p41 p47两道语法题

xiuqi0329

p47,44问：　9、Seldom more that 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected the Hudson River at Albany to the Great Lakes at Buffalo, providing the port of New York City with a direct water link to the heartland of the North American continent. (GWD题)
　　A. Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected
　　B. Seldom more than 40 feet wide or 12 feet deep but running 363 miles across the rugged wilderness of upstate New York, the Erie Canal connected
　　C. It was seldom more than 40 feet wide and 12 feet deep, and ran 363 miles across the rugged wilderness of upstate New York, but the Erie Canal, connecting
　　D. The Erie Canal was seldom more than 40 feet wide or 12 feet deep and it ran 363 miles across the rugged wilderness of upstate New York, which connected
　　E. The Erie Canal, seldom more than 40 feet wide and 12 feet deep, but running 363 miles across the rugged wilderness of upstate New York, connecting
答案选B，但是B中用的是or，为什么用or？同样的D中用or，但是答案解释中说D中的错误之一是用了or而不是D。难道是B中题目打错了？
另外P43,47题。
选答案B：ability to develop 而不是A：ability of developing，答案A中的解释说ability是名词，后面不能跟develop，怎么样都想不通，求问。
谢谢了

bobdog159

楼主！B选项是and不是or。。。。是不是你的or是盗版的。。。。我的OG上明明写的就是and。。。。。。。


ability to do是固定搭配而ability of doing是错误搭配（就像我们不说一只人，而说一个人）。。。。楼主不需要想通