ATHENS, March 28 (Xinhua) -- Greece's general elections will be held on May 21, the country's Prime Minister Kyriakos Mitsotakis announced on Tuesday. "The general elections will be held at the end of the (government's) four-year term, as I had promised from the start," he said during a cabinet meeting. If a second round of elections is required, it will take place at the beginning of July at the latest,