最新 料推荐名词单数变复数练习题1. 请把下面的名词单数变复数。cat_dog_desk_key_boy_story_family_bus_box_watch_potato_tomato_bed_brush_wife_knife_teacher_sister_plane_school_2. 把下面的单数句子变成复数句子。1)This is a book. These _2)It is a red apple. They_)。3That is a eraser. Those3. 填入所给名词的正确形式。1)I have too_(knife)2)There are many_(box)3)She has three_(ruler)1