高中英语语法题,请大侠帮个忙,
①___isworthmentioningthatuniversitylessonscan'tbetheonlyprepartionforallofthesituations__intheworkingworld.
whatthat
我不明白为什么第二个空填that
②ScientistsbelievenativeAmericansarrivedbycrossingthelandbridgethatconnectedSiberiaand____morethan10,000yearsago
A.thisisAlaskaB.AlaskaisnowC.isnowAlaskaD.whatisnowAlaska
为什么选D
③_____,hedoesn'tknowhowtomanagepeoplewell.
A.SmartasJackisB.asJackissmart
请问是选哪个?
③为什么选A,D没打错哦