楷书四大家中是是唐朝人的是（)。

Tolearnwithsuccessisnotaverydifficulttaskifsomefundamentalprinciplesarelaid__(1)__tobethebases.Indiscussingthissubject,fourindispensableprinciplesshould__(2)__,thatis,diligence,devotion,constancyandpunctuality.Allthingscanbeconqueredbydiligence.It__(3)__thefoolishwise,thepoorrich,andthehumblenoble.Itproducesawonderfuleffect.Inlearning,theworkofadiligentfooldoublesthatofalazywit.Devotionmeanstosetourheart__(4)__onethingatatimeandgiveupallotherthoughts.Neverthinkoflearning__(5)__subjectwhilestudyingonething.Thosewhooftenchangetheirstudieswillneversucceed__(6)__thelongrun.Therefore,inordertobesuccessfulweneeddevotion.Constancymakessuccessacertainty,whileinconstancyoften__(7)__infailure.__(8)__westudydayafterday,thereisnothingthatcannotbeachieved.Weshouldremembertheproverb,“Constantdrippingofwaterwearsawayastone.”__(9)__these,thereisanotherrulehelpfultoone’saccomplishments,thatis,punctuality.Thehabitofkeepingaregulartimeis__(10)__extremeimportancetosuccessfullearning.“Workwhileworking;playwhileplaying.”Everymanwillcertainlybecomewiseandsuccessfulifhedoesso.

(1).A、downB、onC、inD、by

(2).A、mentionB、mentioningC、bementionedD、mentioned

(3).A、takesB、hasC、doesD、makes

(4).A、toB、onC、inD、off

(5).A、otherB、othersC、anotherD、either

(6).A、withB、inC、toD、by

(7).A、leadsB、comesC、makesD、results

(8).A、IfB、AlthoughC、AsD、When

(9).A、InspiteofB、ButC、InadditionD、Besides

(10).A、ofB、withC、atD、in

请帮忙给出正确答案和分析，谢谢！