April 26 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Wednesday: ** Czech utility CEZ has received several offers for its assets in Bulgaria and some are interesting, a spokesman said. ** Frontline has made a fifth offer for tanker operator DHT Holdings and given its rival 24 hours to reconsider a deal which billionaire John Fredriksen hopes will forge the world's largest tanker company. ** Canada Pension Plan Investment Board (CPPIB), the coun