The ant is an industrious creature.

The cat is cute.

The horse is a faithful animal. 

You had better go now.

You had better go now 

You must abide by the rules of the office.

If you don't follow the traffic rules, you will be punished.

You must do the work before a week.

= You will do the work before a week.

You had better to leave the place. = You had better leave the place.

You are requested to open the tender. (Active) 

= Please open the tender.

You are .....in..... time. 

You action is not consistent with the rules.

Yesterday he went home.

Civil Aviation Authority 

The Civil Aviation Authority of Bangladesh (CAAB) is the regulatory body for aviation in Bangladesh. It is responsible for managing all nine operational airports in the country, including flight safety, air traffic control, and airport maintenance. The CAAB also ensures that all aircraft are registered and airworthy before they can fly. 
Here are some of the CAAB's responsibilities:
Airport management
The CAAB operates all nine operational airports in Bangladesh, including three international and six domestic airports. 
Flight safety
The CAAB registers all aircraft in Bangladesh and issues or renews certificates of airworthiness. 
Regulatory body
The CAAB implements the rules and regulations of the Government of Bangladesh and the International Civil Aviation Organization (ICAO). 
Bilateral air transport agreements
The CAAB has signed bilateral air transport agreements with 52 states. 
The CAAB is headquartered in Kurmitola, Dhaka. It was established in 1985 as a body corporate with full managerial power. 

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