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Ifanythingshouldhappen,thenearestpersonhecouldcontactby...

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問題詳情:

Ifanythingshouldhappen,thenearestpersonhecouldcontactby...

If anything should happen, the nearest person he could contact by radio , _____ there was a ship nearby, would be on an island 885 miles away.

A. until         B. when           C. once             D. unless

【回答】

D

知識點:連詞

題型:選擇題

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