写出下列单词的复数形式:(1)book _________(2) bus________(3)tomato___________(4)piano________(5)tobacco___________
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写出下列单词的复数形式:(1)leaf___________(2)baby__________(3)man____________(4)foot___________(5)crisis______
写出下列单词的复数形式:(1)fish___________(2)sheep__________(3)species_____________(4)child___________(5)phenomenon____________
写出下列单词的复数形式:(1)Chinese_______(2)Russian____________(3)Englishman_______________(4)breakthrough____________(5)woman doctor_____________
写出下列单词的复数形式:(1)girl friend__________(2)looker-on______________(3)brother-in-law______________(4)forget-me-not________(5)grown-up_____________