two pieces of bread 前用there are还是there is

5. The boys have got already. A. two bread B. two breads C. two pieces of bread

5.C bread不可数名词，要用piece这个量词来修饰，数量多于一时，量词要变复数
6.A apple可数，本身变复数就要加s,这个是将一盒作为一个单位，超过一盒所以box要变复数，而超过一盒的苹果肯定就不止一个，apple当然也要加s
7.D fish作为鱼肉不可数，谓语要用单数is, 作为鱼的条数，是可数的，但是复数也是fish，谓语要用are, 用作鱼的种类可数，复数是fishes,此时谓语用are,标准答案只有D
8.B很简单，watch是可数名词手表的意思，复数watches, 谓语用复数are

two-pieces-of-bread
两片面包
bread
[英][bred][美][brɛd]
n.面包; 食物; 营养，营养物; 生计;
vt.在…上撒面包屑;
第三人称单数：breads过去分词：breaded现在进行时：breading过去式：breaded



例句:

1.
I like to bake bread for my family.
我乐意为我的家庭烘焙面包

由于后面pieces是复数，所以前面的there be动词用are

two-pieces-of-bread
两片面包
bread
[英][bred][美][brɛd]
n.面包; 食物; 营养，营养物; 生计;
vt.在…上撒面包屑;
第三人称单数：breads过去分词：breaded现在进行时：breading过去式：breaded
例句:
1.
I like to bake bread for my family.
我乐意为我的家庭烘焙面包

此类短语的谓语动词用单数还是复数，主要看量词（这里为piece）的单复数 eg. There is a piece of paper. there are several pieces of paper. SOME BREAD 那个应该是单数 ，不可数的