二. 用括号内所给单词的适当形式填空。 1 . It's a good habit to brush our _______ (tooth) twice a day. 2 . We shouldn't eat too much icec ream.It is bad for our __________ (stomach) . 3 . How many _______ (foot) does a cat have? 4 . I was so careless that I cut _______ (I) just now. 5 . P lease sit down and ______ (rest) your legs.