[填空题]Abel Xavier, Middles rough’s Portuguese defender, has failed a drugs test and been suspended from all football by FIFA, football’s world governing body. Xavier’s urine{{U}} (36) {{/U}}after Boro’s UEFA Cup tie in Xanthi, Greece, was found to be positive. Xavier is protesting his{{U}} (37) {{/U}}to the club. Xavier is believed to have been taking a supplement to{{U}} (38) {{/U}}a virus. For the time{{U}} (39) {{/U}}Middlesbrough are{{U}} (40) {{/U}}by Xavier, though they are making no public statements, but a further test will now follow on Xavier’s sample and, if that is found to be positive, then the defender, who turns 33 next month, may be banned for a{{U}} (41) {{/U}}period that his career is effectively over. UEFA is overseeing the investigation as the test was taken after a game under its{{U}} (42) {{/U}}and the relevant{{U}} (43) {{/U}}is due to meet and report next Monday. Boro would confirm only that Xavier had failed one test. An UEFA spokesman said: "