【题目】用所给单词的正确形式填空。
【1】Two________( mouse) are black.
【2】That cat is _______(chase) a mouse now.
【3】Tom is angry with________.(they ).
【4】Sarah is _______ (worry).
【5】They look very ________(happy).
【答案】
【1】mice
【2】chasing
【3】them
【4】worried
【5】happy
【解析】
略
