Scientists believe Native Americans arrived by crossing the land bridge that connected Siberia and _________ more than 10 000 years ago.?
A．this is AlaskaB．Alaska is now?
C．is now AlaskaD．what is now Alaska?
D?
賓語從句what is now Alaska“現(xiàn)在叫阿拉斯加的地方”。what引導的從句含有“所……的（東西）”之意。
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