Exercise is a must to keep your body fit and mind alert.
Peace, is a must for mankind in the modern world.
Travel light if you must.
You must give me clear-cut instructions as to what I should do.
We must take care that nobody kills animals.
The old fort must have been magnificent in its hey days.
They must be behind us for some sinister purpose.
He must be worrying about us.
You must show me a way out of this.
You must park your vehicle at the proper place.
Every college must have a good library.
Education must be job-oriented.