Nobody knows how people first came to these islands. They must have come from So

游客2023-12-15 61

问题 Nobody knows how people first came to these islands. They must have come from South America on rafts.

选项

答案 must——might

解析前半句强调“无人知道”，因此后半句应当是不肯定的推测，用might have done。must have done是肯定推测，与句意不符。

转载请注明原文地址:https://tihaiku.com/zcyy/3274801.html

相关试题推荐

随机试题

最新回复(0)

TheAnglesand______aretheancestorsoftheEnglishpeopletoday.A、VikingsB、