单项选择
1.how many _________ are there in your school library? a. shelf b. shelfs c. shelves d. book
1.how many _________ are there in your school library? c. shelves shelf的复数为shelves。以f或fe结尾的名词单数变复数时，变f或fe为v再加es，同样的还有：knife, leaf, wolf, wife等。
答：答案是D,后面是复数形式,bread和meat是不可数,meat不能加S,potato和tomato的复数形式都是后面加es详情>>
