61.Antonym of "Optimist".

Ans:Pessimist

62.Antonym of "Praise".

Ans:Criticism / Blame

63.One word substitution: A person who does not believe in God.

Ans:Atheist

64.One word substitution: A person who eats everything.

Ans:Omnivore

65.One word substitution: A person who loves books.

Ans:Bibliophile

66.One word substitution: A doctor who treats children.

Ans:Paediatrician

67.One word substitution: A place where money is coined.

Ans:Mint

68.One word substitution: One who studies the stars and planets.

Ans:Astronomer

69.One word substitution: A speech made without preparation.

Ans:Extempore

70.One word substitution: A person who walks on foot.

Ans:Pedestrian

71.One word substitution: Words engraved on a tomb.

Ans:Epitaph

72.One word substitution: A medicine that kills germs.

Ans:Antiseptic

73.What does the idiom "a piece of cake" mean?

Ans:Something very easy to do

74.What does the idiom "once in a blue moon" mean?

Ans:Very rarely

75.What does the idiom "to spill the beans" mean?

Ans:To reveal a secret

76.What does the idiom "break the ice" mean?

Ans:To start a conversation

77.What does the idiom "under the weather" mean?

Ans:Feeling ill

78.What does the idiom "call it a day" mean?

Ans:To stop working for the day

79.What does the idiom "hit the sack" mean?

Ans:To go to bed

80.What does the idiom "let the cat out of the bag" mean?

Ans:To reveal a secret accidentally