Do you know the phrase “burn the midnight oil“? Read the conversation below. Can you guess the meaning?

Terry: Eddie looks tired today. Is he OK?

Paula: I think he was burning the midnight oil last night trying to get his work finished before the deadline.

Does it mean:

a) work late into the night

b) keep the heater on all night

c) work late on a cold night

d) stay up until midnight

The answer is below! ↓

Answer: a) work late into the night