那cake为什么加sA box of cakes 选is

那cake为什么加sA box of cakes 选is 一盒蛋糕是a box of cake还是a box of cakes?为什么 There is a lot of ?in the box. A.cake B.bags of cakes C.milk some cakes与piece of cake two bags of ( ) A.cake B.cakes 为什么two pieces of cake 中的cake不加s? it's time for some cake为什么cake而不是cakes Here()a box of cakes for you.A is.B are.C has is your final exam difficult?no,it'sa piece of cake to me.翻译 There is a lot of_____in the box.a.cake b.milk c.bags of cak There is a lot of cake in the box.这样表达有问题么? two pieces of cake 还是 two pieces of cakes?cake 到底可不可数