【1】What kinds of tree are this?__________

【2】Hippoes are mammals. __________

【3】Giraffes are as tall a tree. __________

【4】It can run in one kilometer a minute.__________

【5】Her house is in fire. __________

【答案】

【1】this改为these

【2】Hippoes改为Hippos

【3】a改为as a

【4】a改为one a

【5】in改为on

【解析】

略