I hope it is not too late for you exam: optimization is optional.
Mandatory
mandatory spares
Education is mandatory in many countries.It is mandatory that you attend this meeting.
Education is mandatory in many countries.It is mandatory that you attend this meeting.
Education is mandatory in many countries.It is mandatory that you attend this meeting.
Mandatory Palestine was created in 1920.
Now is not mandatory.
The end of mandatory ROTC
The correct spelling is "mandatory."
Yes school is mandatory in Thailand.
No. It is not mandatory
Attendance is mandatory means you have to go.