1.b> ; a snail('s) shell ; mollusc shell ; some children were collecting shells on the beach i> ;
2.b> (, i>); , , (, i>); an egg shell ;
3.b> 1) , ( .i>); tortoises have a hard shell ;
2) (i>) [.i> .i> tortoiseshellr> 1 2)];
4.b> .i> , (i>); white phosphorus shell ; leaflet shell ( i>); mortar shell ;
5.b> .i> 1) / ;
2) ;
6.b> ; (, ..i>);
to come out of one's shellb> , , ; to go / to retreat / into one's shyb> ; , .