It’s not until you have lost your health _______ you always take for granted _____ you know its value.

Mom, my classmates are playing outside. Can I join them— Not until your homework .

The world _______ not be ready for me, but ready or not, I am here now.

________students are required to take part in the boat race

With all his attention ________ on his experiment, he has no time to spend with his family.[ ]