写出下列名词的复数形式。

①May I have some ____ (plum), please? Sure.

②There are seven ____ (boy) in the playground.

③The woman has two ____ (baby).

④How many ____ (peach)? There is only one.

⑤There are two ____ (library) in our school.

把8米长的电线平均截成4段，每段占这根电线的____，每段长____米．

一个多项式减去x²+14x﹣6，结果得到2x²﹣x+3，则这个多项式是____