As the deadline approached, the team had to ________________________.

Burn the midnight oil (idiom):
English Meaning - To work late into the night.
Bangla Meaning - অধিক রাত পর্যন্ত জেগে কাজ করা।

Complete Sentence - As the deadline approached, the team had to burn the midnight oil to complete the project on time.

Other options,
Throw in the towel - Stop trying to do something because you have realized that you cannot succeed.
Hit the nail on the head - To describe exactly what is causing a situation or problem.
Beat around the bush - To avoid talking about what is important.

Source: Cambridge Dictionary.