It is a great store, because it remains open twenty-four seven.

• throughout the day
• throughout the night
• throughout the day and night
• None of these
Correct Option: C  [ throughout the day and night ]

Remark:

The man cannot be trusted in the post for he has an itching palm.

• habit of taking bribe
• has an infectious disease
• habit of flattery
• a quarreling habit
Correct Option: A  [ habit of taking bribe ]

Remark: Itching palm: A desire for money, greed, wanting a bribe.

Alice is very good at quant, but when she was watching a teacher's video she was taking it with a grain of salt.

• She was enjoying the video
• To listen to something with considerable doubt
• She was listening with full attention
• She was not listening with full attention
Correct Option: B  [ To listen to something with considerable doubt ]

Remark:

All our effort ended in smoke.

• to come to nothing
• to gain importance
• to praise oneself
• to reach target
Correct Option: A  [ to come to nothing ]

Remark: ended in smoke: means to fail or be unsuccessful after a lot of effort.