关于主谓一致的问题,

问题描述:

关于主谓一致的问题,
1.Poultry____(include)chickens,ducks,and other birds that are kept for their eggs and meat.
2.Merchandise___(be)goods that are bought,sold,or treded.
上面的要怎么填,为什么?请一定要说明原因,因为我有参考答案,
还有这两句
The mother,along with her two children,___(be)living a miserable life.
This term___(be)competing with its rival.

include .统称,所以是不可数名词.
IS 商品是抽象名词.所以也是单数.