banned substance造句怎么写

4、And a deputy sports minister for years ordered cover-ups of top athletes' use of banned substances.

2、Milan's proposed January bid for Vincenzo Iaquinta has hit the rocks after Marco Borriello tested positive for a banned substance.

1、Phelps has never tested positive for a banned substance.

3、Spains Alberto Contador, who won the Tour de France this year for a third time, has failed the test for a banned substance.