写出下面单词的复数 1.pen 2.strawberry 3.watch 4.key 5.dictionary 6.backpack 7.brother 8.tomato 9.h写出下面单词的复数1.pen 2.strawberry 3.watch 4.key 5.dictionary 6.backpack 7.brother 8.tomato 9.hamburger 10.egg 11.basketball 12.skirt 13.documentary 14.student
问题描述：
写出下面单词的复数 1.pen 2.strawberry 3.watch 4.key 5.dictionary 6.backpack 7.brother 8.tomato 9.h
写出下面单词的复数
1.pen 2.strawberry 3.watch 4.key 5.dictionary 6.backpack 7.brother 8.tomato 9.hamburger 10.egg 11.basketball 12.skirt 13.documentary 14.student
答