(Reuters) - European shares reversed course to trade lower on Thursday after China said it doubts a long-term trade deal is possible with the United States, tempering gains that came earlier in the day after the Federal Reserve cut interest rates. A Bloomberg report said that China is doubtful of a long-term trade deal with U.S. President Donald Trump, raising fresh uncertainty about trade progress between the two countries after an interim trade deal was almost finalised.By 0950 GMT, the..