初中英语语法——名词（选择题）
1.There are four ______ and two _____ at the ______.
A.Johns,Marys,doctors
B.Johns,Marys,doctor's
C.John's,Mary's,doctor's
D.John,Mary,doctor's
2.British people eat _____ a lot,and they are usually cooked in different ways.
A.chicken
B.beef
C.fish
D.potatoes
要求：讲解相关知识点，说明为什么选答案，其它选项为什么不对。