The policy has been declared to be null and void.

• Invalid
• Empty
• Valid
• Impossible
Correct Option: A  [ Invalid ]

Remark:

The minute she arrived at the office, she was given the pink slip.

• a raise
• a promotion
• a letter to inform that she had lost her job
• a letter to inform that she had been transferred
Correct Option: C  [ a letter to inform that she had lost her job ]

Remark:

Don't mix with the bad hats.

• people of bad character
• people selling bad hats
• people of poor status
• people with bad hats
Correct Option: A  [ people of bad character ]

Remark: bad hats: someone who deliberately stirs up trouble, mischief-maker, trouble maker,

His oily tongue has won him promotion.

• soft speech
• word power
• flattery
• fluency in speech
Correct Option: C  [ flattery ]

Remark:

I am all at sea.

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

Remark:

If you talking about a "tit for tat" situation, you are:

• making someone angry
• doing harm as done to you
• rewarding people for the good done
• taking advantage of someone
Correct Option: B  [ doing harm as done to you ]

Remark: "tit for tat": is an equivalent given in return, retaliation in kind.

The idiomatic expression 'see eye to eye' means

• agree with someone
• to remain neutral
• to take over (something)
• to enjoy the best of both
Correct Option: A  [ agree with someone ]

Remark:

A good teacher should have the gift of the gab.

• a good personality
• a talent for acting
• a talent for speaking
• an interest in discipline
Correct Option: C  [ a talent for speaking ]

Remark:

The idiomatic expression "pull yourself together".

• drag oneself
• help me
• get angry
• calm down by oneself
Correct Option: D  [ calm down by oneself ]

Remark:

He says he has invented a time machine, which is clearly a load of cobblers.

• Genuine
• Great
• Nonsense
• Significant
Correct Option: C  [ Nonsense ]

Remark: "A load of cobblers" is indeed an idiom, and it is commonly used to express that something is nonsense, untrue, or of poor quality.