Foundation
English
Tenses
Sentences
Tenses
Question
Fill in the blank with the most suitable option:
The package ______________ to the wrong address.
Must have been sent
Might have sent
Could have sent
Ought to be sent
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Solution
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The correct answer is Option A.

MUST HAVE BEEN expresses certainty of a fact. In the given sentence, the speaker is certain that the package is sent to the wrong address.
Thus Option A is the correct answer.
The remaining options are incorrect because:
OUGHT TO BE SENT expresses obligation.
COULD HAVE SENT expresses ability.
MIGHT HAVE SENT expresses possibility.