to end in smoke : efforts that come to nothing or are useless
● All his schemes ended in smoke. The best option is to come to nothing.

Correct Option: C

to end in smoke : efforts that come to nothing or are useless
● All his schemes ended in smoke. The best option is to come to nothing.

to have something up one’s sleeves : to keep a plan or an idea secret until you need to use it
● I have something up my sleeve that will solve all your problems. The best option is having a secret plan.

Correct Option: D

to have something up one’s sleeves : to keep a plan or an idea secret until you need to use it
● I have something up my sleeve that will solve all your problems. The best option is having a secret plan.

to take to one’s heels : to run away from somebody/something
● As soon as the thief saw the police, he took to his heels. The best option is to run off.

Correct Option: A

to take to one’s heels : to run away from somebody/something
● As soon as the thief saw the police, he took to his heels. The best option is to run off.

to turn a deaf ear : to ignore/refuse to listen to somebody/something
● Sheela turned a deaf ear to our pleadings. The best option is to be indifferent.

Correct Option: B

to turn a deaf ear : to ignore/refuse to listen to somebody/something
● Sheela turned a deaf ear to our pleadings. The best option is to be indifferent.

at a snail’s pace : very slowly
● Things are moving at a snail’s pace, but we’ll finish on time. The best option is very slowly.

Correct Option: A

at a snail’s pace : very slowly
● Things are moving at a snail’s pace, but we’ll finish on time. The best option is very slowly.