英文高手们,考验的时候到了,HELP ,GIVE ME YOUR ADVICE!

英文高手们,考验的时候到了,HELP ,GIVE ME YOUR ADVICE!
a ten dollar bill
Sam waited patiently in the long line at the grocery store .He had come to pick up a few items for his mother.He often did chores for his parents after school.He enjioyed helping out at home.As he waited ,he daydreamed about the new camera he wanted to buy .He wanted to buy it soon because his family was going on a vacation,and he wanted to take pictures of their trip.there was only one problem .He needed seven more dollars buy the camera.His lawn mowing job at the Smith's should provide the money shortly .
Suddenly ,Sam was rougly shoved aside .He recogniced Mrs Sanders ,an unkind and unfriendly person who lived on his block .She had shoved in front of him without even smiling.Just as Mrs.Sanders received her changeand her prechanses,a ten-dollar bill flew out of her hand and fell at Sam's feet .Mrs.Sanders,however,was too busy criticixing hte cashier for his slowness to notice.
AS Sam bent ot pick up the money he thought quickly.The money did belong to Mrs.Sanders,but she deserved to lose it after the way she had behaved,and ,with it ,hicould buy the camera..请用10-15个句子复述,
重点,现在完成时,过去完成时,