问题补充:
单选题ScientistsbelievenativeAmericansarrivedbycrossingthelandbridgethatconnectedSiberia(西伯利亚)andmorethan10,000yearsago.A.this is AlaskaB.Alaska is nowC.is now AlaskaD.what is now Alaska
答案:
D解析这题考查what引导的宾语从句:connect后面应该是宾语从句,从句中缺少的是主语,所以用what引导。选D.