27.As Senior 3 students, it is important to________a good state of mind.
I will answer the teacher’s question when _______.
She decided to apply _____ the boss _____ the new position .
The number of people invited to the party 200 but a number of them ___absent for different reasons.
The boy was put into the prison for of stealing a lot of knives.
$100 a month could hardly the cost of his life in such a big city in this country.