下列名词的复数形式
1.am2.is3.he4.she5.it6.that7.this8.you9.pen10.desk11.key12.orange3.boy14.friend15.parent16.mother17.this18.boy19.sister20.father21.daughter22.cousin23.card24.case25.family26.box27.egg28.class29.child30.shelf31.bed32.radio33.photo34.tomato35.woman36.man37.strawberry38.dictionary=