1.b> i> ; a light sleeper ; a heavy sleeper ; to be a sound sleeper ;
2.b> i>, ; only the snores of the sleepers broke the silence of the house ;
3.b> 1) ( i>); the London Edinburgh sleeper i> ;
2) (i>);
3) , ( i>);
4.b> .-.i> (.i> railway sleeperr>);
5.b> .i> "", " " ( i>); we believe that a sleeper has planted a virus in our computer system , "" .