--the place isn't crowded --____ it's difficult to make our way out a,yes it is b,no it isn't

--the place isn't crowded --____ it's difficult to make our way out a,yes it is b,no it isn't
--the place isn't crowded --____ it's difficult to make our way out a,yes it is b,no it isn't

--the place isn't crowded --____ it's difficult to make our way out a,yes it is b,no it isn't
答案：A.
1.此类题目解答的技巧很简单：
先无视问句的肯定否定,直接看问句句意,根据答语或实际情况进行回答.
如果是肯定的,则用Yes,其后再保持形式一致（肯定形式）；
如果是否定的,则用No,其后形式亦保持一致（否定形式）.
2.问句无视否定后,即为：the place be crowded,再根据答语it's difficult to make our way out 之意,可以判断为肯定,所以用Yes,it is.
另：原句变成The place is crowded,其答案根据后面it's difficult to make our way out的句意,也是Yes,it is.

a,yes it is
这里不太拥挤
这里很拥挤,我们很难找到出路

选A. 回答反义疑问句，不管前面怎么问，回答根据事实来回答。如果情况是肯定的就是yes，it is；如果事实是否定的，就no. it isn't。
此题，根据后面说的 他们很难找到路出去，说明事实上还是很拥挤的。 所以 选A