This is one of the few pictures in which we cannot see pants when girls squat down....

Well...my english is not good...is the sentence above correct? When I have written the comment, I'm getting confused about the usage of "which"...pl. verion...maybe "those"? You know i can't ask my teacher with this image and what i said, so somebody helps me......

Yeah, the sentence and the use of "which" is good!
If you don't mind me pointing out, instead of "I'm getting confused" you should have used "I got confused."
Hope this helps!

Thanks a lot! I think I've found another weak point in my english learning.....