she only eats fruit ______( keep) slim

问题描述:

she only eats fruit ______( keep) slim
his favourite food _______ (be) rice and noodles.
fish and chicken _______(be)her favourite food.

(1)to keep 动词不定式表目的
(2)is 主语food 是不可数名词
(3) are 主语是两个,fish 和chicken,both …and