stamps are used for_____(post）the letter

Stamps are used for sending letters.对sending letters提问 stamps are used for_____(post）the letter stamps are used - sending lettersFOR TO WITH BY 为什呢选for呢?其他为什么不可以 These are China stamps. Stamps are used ————sending letters选择题A,by B,for C,with D,to These stamps are from Mexico.They are ( )stamps These stamps are from China.They are ( )stamps. Are you have any stamps The stamps are very beautiful.(改为感叹句) _ _ stamps! For_(who)are they having a birthday party?填什么?用适当形式 There are some stamps from Canaba.急用`! The stamps are very beautiful.改为感叹句 where are the stamps from?怎么回答 How much are the stamps同义句, The stamps are very colourful and ____ where are this stamps from怎么改 ______beautiful stamps they are!(what 还是 how) There are some stamps.(否定句)