When one character ends with ㄹ and the next starts with ㄹ, they are both pronounced "L". So 콜라 would be "kolla". If it were just 코라, it would be "kora".
Is it just me that really dislike studying with names of corporations, citys and words borrowed from English? Isn't there any simple Korean words that could be used on the exercises?
I think it is to get you used to the pronounciations and the fact that they pronounce things differently, and sometimes don't even pronounce it, like the R of Starbucks