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 Nobodyknowshowpeoplefirstcametotheseislands.They

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問題詳情:

 Nobodyknowshowpeoplefirstcametotheseislands.They

 Nobody knows how people first came to these islands. They ______ from South America on rafts.

A. must have sailed                 B. can have sailed  

C. might have sailed                D. should have sailed


【回答】

C

知識點:虛擬語氣與情態動詞

題型:選擇題

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