How much/How many are they?Three pages.

How much/How many are they?Three pages. how many yuan are they?how much yuan are they How much are they? how much are they how much ( ) are they how much are they ,how much they are how much ( ) are they they ( )40yuan how many pages do we have left? How much are they?= How much ___they____? A how much cost they are B how much do they cost C how much ()() are the books?用How much,还是 How many How much are they的解释