The cops were on their toes throughout the day.

• eager
• alert
• harried
• quick
Correct Option: B  [ alert ]

Remark:

I am all at sea.

• out of reach
• very happy
• puzzled
• drowning
Correct Option: C  [ puzzled ]

Remark:

Choose the most appropriate meaning of the idiom "To cry wolf".

• To Cry copiously
• To raise false alarm
• To be frightened
• To scare people
Correct Option: B  [ To raise false alarm ]

Remark: To cry wolf: to keep asking for help when you do not need it, with the result that people think you do not need help when you really need it.

A damp squib

• rainy weather
• a disappointing result
• a skirt in a laundry
• Great honour
Correct Option: B  [ a disappointing result ]

Remark:

For the first week, the apprentice felt like fish out of water.

• frustrated
• homeless
• disappointed
• uncomfortable
Correct Option: D  [ uncomfortable ]

Remark:

He is a dark horse.

• silent
• secretive
• dangerous
• possessing a secret ability.
Correct Option: D  [ possessing a secret ability. ]

Remark:

In the new place he had to earn by the sweat of his brow.

• Very hard work
• Frown of his brow
• Seriously
• Idly
Correct Option: A  [ Very hard work ]

Remark:

With the existing management the future of the company is in doldrums.

• dull
• bright
• uncertain
• secure
Correct Option: C  [ uncertain ]

Remark:

He does not like to be friendly with Sarita, he always gives her a cold shoulder.

• Pushes her with his shoulder whenever they meet
• Creates all sorts of troubles for her
• Insults her in the presence of others
• Tries to be unfriendly by taking no notice of her
Correct Option: D  [ Tries to be unfriendly by taking no notice of her ]

Remark:

He is in deep water and needs your help.

• great difficulties
• under the water
• a sea
• pain
Correct Option: A  [ great difficulties ]

Remark: "deep water" meaning: in a difficult or awkward situation.