There are some_in these.a.knifes...pencil-boxes b.knives

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There are some___in these__.a.knifes...pencil-boxes b.knives...pencils-box
c.knives...pencil-box d.knives...pencils-boxes
选择D对吗?

对的,knife的复数是knives.变fe为ve加s.
pencil-box复数为X后加ES
再问：那pencil-box变为复数pencils-boxes都得变为复数？
再答：这道题是哪里的啊，是不是错的啊，我刚才没有没清楚，pencil-box变为复数应该是pencil-boxes
再问：恩，我明白啦，谢谢，题的答案给的就是错误的

There are some___in these__.a.knifes...pencil-boxes b.knives There are some knives in these___.A.box B.boxes C.boxs 初四英语选择1.Knives ＿ things,we ＿ things with knifes.A are used t There are ____over there.A.two boxes of books B.tow boxes of Those are my ( ).A pencil B boxes C watchs D pens There are _in the room.A.three boxes of egg B.three boxes of There () a pencil and some pens in the pencil case A.are B.i Whose knives are there回答 there are some rulers in our pencil boxes(变成单数形式)there_ _ _i there are （） on the floor A.some box B.some boxes ( )1.There are two__on the table.A .box of egg B.boxes of eg （） there any boxes of milk in the fridge?A.Is B.Are