The lecture was boring, everyone was busy on their phone ______ the session.

• in
• at
• after
• during
Correct Option: D  [ during ]

Remark:

Good sleep is necessary ___________ good health.

• of
• for
• at
• from
Correct Option: B  [ for ]

Remark:

Adults suffering chicken pox(A)/ can develop(B)/ all kinds of complications.(C)/ No error(D)

• A
• B
• C
• D
Correct Option: A  [ A ]

Remark: Use Adults suffering from chicken pox

Preamble (Find Synonym)

• definition
• mediation
• conclusion
• introduction
Correct Option: D  [ introduction ]

Remark: A preamble is an introductory statement in a document.

There is _______ great deal of confusion here.

• a
• the
• an
• no article is needed
Correct Option: A  [ a ]

Remark:

Thick mist hung ............... the forest.

• over
• on
• around
• about
Correct Option: A  [ over ]

Remark:

A place where birds are kept. (one word substitution)

• Attic
• Nursery
• Aviary
• Zoo
Correct Option: C  [ Aviary ]

Remark:

It hasn't rained ___ Monday.

• from
• on
• since
• at
Correct Option: C  [ since ]

Remark:

He is not familiar ________ this locality.

• to
• from
• about
• with
Correct Option: D  [ with ]

Remark:

This magazine _________ twice weekly.

• is appearing
• appearing
• appears
• appeared
Correct Option: C  [ appears ]

Remark: Subject is "Magazine" a Singular noun, go with singular verb.