how many是对可数名词的确复数进行提问，后接复数，用数字回答。如：How many do you smoke a day？你一天抽多少根烟？
1.How many students are there in your class?
2.How many dynasties are there in Chinas history?
3.How many people have accessed your homepage by now?
4.How many feeds a day does this dog get?
5.How many military bases are they maintaining on foreign soil?
6.How many ribs does a man have?
7.How many inches of rain fell last year?
8.How many ventricles of heart does a man have?