how many rulers are there on the desk

how many rulers are there on the desk How many rulers are there on the desk?Four这个句子对还是错,要讲明为什么的哦? how many books are there on the desk?怎么回答? how many _____(watch)are there on the desk how many () (box）are there on the desk. How many apples are there on the desk now?There aren't ____ How many rubbers are there on the desk?There is o____one There are a book and two rulers on the desk句子改错 _____ many books there are on the desk!填what还是how,重谢! How many books are there on the desk?分析一下句子结构好吗 怎样回答How many books are there on the desk.这个句子,拜托 急用. 对three提问How many glasses of milk are there on the desk那错了