<prompt> Translate the following text to EnglishKabla ya ujenzi wa barabara kuu katika enzi ya kisasa, upatikanaji wa ndani ya msitu ulikuwa na katika baadhi ya kesi, bado ni tu kwa mto.  <response>: Until the highway construction in the modern era, access to the jungle interior had been and in some cases, still is only by river. 