21阅读下面短文,按照句子结构的语法性和上下文连贯的要求,从各小题的四个选项中选出一个最佳答案,使短文连贯完整
AsnowshoeharenamedClaralivedahardlifewithhisfamilyinthenorthernpartofAmericabecauseitwassnowymostoftheyear
OnedayClarasuddenly21withanidea
“Whynotmovetothesouthwhereitiswarm
"Hethoughtaloud
“Ifso,I'llneverbe22aboutfoodandnolongergohungry
"Hetoldhisthoughttohisfamily
“23sillyidea
You'llpayforit
"Hisfamilysaidwithonevoice,butClaramadeuphismind24formigration(移民)
Clarawentthroughgreat25andfinallyreachedtheopengrasslandinthesouth
Whatfreshgrass
"Heshouted26
Butrightatthemoment,Clarasuddenlyfeltsomethingwrong
Helookedupbutonlytofindaneagledashing(俯冲)towardhim
“Mum'slittleboy
"Heshoutedout
Butitwas27latetoescape
Clarawascaughtby28eagle
Actually,eaglesareborntobetheenemyofsnowshoehares
Butinthenorthernarea,snowshoe29hairis