Emma, I have the same problem as Jude. There is no box to place the answer in, and neither is there any tickbox.
I was using Chrome, just swapped to IE, and the problem was solved!
Despite having sent an e-mail (and getting no reply) I thought I would try this way to complain about the competition page.
As there is no space to put the answer, how am I supposed to enter these competitions? Do you just highlight it?