How much does it cost( )bus?A、at B、on C、by请问这道题应该选择哪个选项.为什么选哪个选项.

how much does it cost还是how much does it? How much does it cost___bus? How much does it c()? How much does it cost=什么 how much does it 同义句是什么? 有how much does it weigh 那么有 how much does it high 为什么是how much does it weigh 而不是how many.. how much does it _to buy it填什么 how much does it cost?为什么是how much 不是how many how much does it cost 可不可以用how much is it cost? How much is it going to cost和how much does it cost有什么区别? I asked the clerk at the post office__a.how much does it costb.how much did it costc.how much it costd.how much it costed how much does it cost?的另一种表达方式 How much does it cost to become a moth. how much does it cost busa atb onc by 括号内填什么How much does it cost ()bus? How much does it cost?(同义句） How much does it < How much does it < about 3 years A spent B cost C take D pay