I don’t like sports _________ people easily get hurt

Peter, can you tell me _____—-He used to be short,but now he is tall and heavy.

They didn’t ________ the true meaning of what the boss had said, and thus their task almost completely failed.

I have reached a point in my life _____ I am to make decisions of my own[ ]

_____ annoys the teacher most is that all the students are too quiet in class.