Bananas,orange and apple are all f_____."fruit"加"s"吗?

Bananas,orange and apple are all f_____."fruit"加"s"吗? apples,bananas and pears are all fruit这句话中fruit加s吗 apple orange strawberries and pear are fruit要加s吗 1."fruit"加s吗?比如说：Apples,pears and bananas are all f____ . Bananas,pears and strawberries are all f____.（fruit加s吗?） bananas and apples are his favorite (fruit)这里的fruit要加s吗,还有to banana and apple are fruit中的furit要加s吗? the ,and,the,apple,orange,both,healthy,are,fruit. 改错"Apples, bananas and orange are fruits" Apples,bananas and orange are fruits.改错 My favorite fruit is bananas.这句话对吗?fruit要加s吗? mangoes are my favourite fruit.fruit要加s吗