there a lot of junk food in the bag是填is 还是are为什么

there a lot of junk food in the bag是填is 还是are为什么
there a lot of junk food in the bag
是填is 还是are
为什么

there a lot of junk food in the bag是填is 还是are为什么
is 因为junk food 是不可数名词~~