指水果时不可数可指有多少种水果时可加S,不明白,最好有例句给我看
那这题, It is healthy eating habit to eat a lot of ( )every day .A. fruits and vegetables D,fruit and vegetables 我选了A,错了..复我哦,谢
填D因为这里的fruit是指所有的水果,fruis是特指的几种水果