Our class has 50 people,including our English teacher/our English teacher included 请问这两句句子对吗?

our class后面跟has还是have our class has fifth student同义句 Our class has 50 people,including our English teacher/our English teacher included 请问这两句句子对吗? our class has fifty students.为什么用has不用have our class has more than 60 students=-----,------60 students in our class Our class ____ ten girls have 还是 has He has elected ____ monitor of our class Our class has fifty students改为同义句 Our class has fifty students.的同义句 Our class has fifty students.（改为同义句） Our class has fifty students.(句意不变,改写) Our class has fifty students(改为同一句） Our class has a mop of China改为同义句 our class has 45 students（改为同义句） （ ）（our class has 45 students（改为同义句）（ ）（ ）45 students in our class. Our class has forty-five students.（改为同义句） （ ）（ ）forty–five students in our class. Our P.E.teather has o___ a football game between our class and Class2. Our P.E.teather has o___ a football game between our class and Class2 Every student in our class has lunch at school.为什么用has、不用have