Give the plural form of countable nouns. (请写出下列可数名词的复数形式) 1.hand______ 2.place______ 3.class______ 4.wish______ 5.box______ 6.church______ 7.family______ 8.toy______ 9.knife______ 10.roof______ 11.potato______ 12.photo______ 13.euro______ 14.woman______ 15.tooth______ 16.child______