Hello Iris, I'm from Britain so I'll have a go at this British textbook. All they are doing is hoping you spot the 'it' in number one, and the lack of 'it' in number two. So 1 is 'go with' and 2 is 'match'. So it is a little training exercise in 'spot the it!' But if this was an exercise in meaning alone.. then I agree, 'match' might be better for number1. "Go with it," has less clarity of meaning... it could mean simply that there is another item you could buy with this dress/or comes free with it! For example, "I bought a new CD player the other day, and it had a headset that went with it." It's not clear if I had to pay for it.. from that sentence alone!

I think 1 could be either, although I'd lean towards "go with". However 2 is "match" because you need an extra "it" at the end to make "go with" fit there. Eg Now all I need is a pair of shoes to match. vs Now all I need is a pair of shoes to go with it.

Well, I am not that good at English but I guess you can put either of them in the 1. And in 2 if there was "it" at the end, both would work in 2 as well. If I were you, without using "it" at the end of second, I would choose "go with". However, using either of them sounds incomplete to me in 2.