"I eat a sandwich and rice."
Translation:Ik eet een boterham en rijst.
Well, something is wrong. It might be the program makes a mistake, and if that's so, if you get the same question again report that your solution should be accepted. But experience seems to suggest that it's more often the users making the mistakes, just not the one they are focusing on. E.g. the user might focus on the verb, and after typing that, might do the words behind it, ignoring the fact that there should also be a word coming before the verb.
Check it again, next time, and if you really can't find it: Copy your solution here, so all of us can have a try to find the problem.