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Question

1.
2.
3.
4.
Answer (Detailed Solution Below)

Option 4 : The science laboratory must be cleaned before Monday.

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Detailed Solution

सही उत्तर The science laboratory must be cleaned before Monday. है।

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PrepSnapprepsnap.in • Part -A

Question:

Choose the correct passive form of: "Someone must clean the science laboratory before Monday."

1.
The science laboratory must have been cleaned before Monday.
2.
The science laboratory has to be cleaned by someone before Monday.
3.
The science laboratory is to be cleaned before Monday.
4.
The science laboratory must be cleaned before Monday.

Correct Answer: The science laboratory must be cleaned before Monday.

A modal plus base verb becomes modal plus "be" plus past participle — "must be cleaned". The agent "by someone" is dropped as redundant, (a) wrongly adds perfect aspect, and (c) changes the modal force with "is to be".

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