一道英语阅读..写出原因

Hewaswellknownforhisworksandhumor．EverybodyknowsMarkTwainwasafamousAmericanwriter．Butbeforehewasfamous,evenhisneighboursdidn'tknowhimwell．

OnedayMarkTwainwenttoborrowacertainbookfromaneighborinTarrytown．

"MayIborrowabookfromyou?"heaskedpolitely．"Yes．"theneighbortoldhim,"butImustaskyoutoreadithere．YouknowIneverletanybodytakemybookoutofmystudy（书房）．"

SomedayslatertheneighborwishedtoborrowMarkTwain'smachineforcuttinggrassinthegarden．

"MayIborrowyourmachinetocutthegrassinmygarden?"theneighboraskedwithasmileonhisface．"Certainly．"MarkTwaintoldhim,"butImustaskyoutouseithere．YouknowthatIneverletanybodytakemymachineoutofmygarden．"

51．MarkTwaincomesfrom_______．

A．EnglandB．AmericaC．JapanD．France

52．Whydidn'tMarkTwain'sneighborlendthebooktohim?Because_______．

A．hisneighbormadeitarulenot1oletanybookgooutofhisstudy

B．hisneighbordidn'tlikehim

C．henevermetMarkTwain

D．MarkTwaindidn'tpaymoneyforthebook

53．Whowantedtoborrowthebook?

A．Thebook．B．Themachine．C．MarkTwain．D．Neighbor．

54．WhatdidMarkTwain'sneighbourborrowhismachinefor?

A．Toplaygames．B．Tocutthegrass．

C．Tocuttrees．D．Tocuthishair．

55．Whydidn'tMarkTwainlendhismachinetohisneighbour?Because_______．

A．hedidn'tlovehim

B．hisneighborwasn'tfriendlytohim

C．hisneighbordidn'tgivehimmoney

D．hisneighborwasathief