1.Bush moved with his parents to Texas, where his father engaged in a career in the petroleum business.     Bush moved with his parents to Texas, where his father embarked on a career in the petroleum business.   Which is right or which is better?  fficeffice" />

2.In 1965 he enrolled at Yale University    Does it mean “he was able to go to the university to further his education”?

3. He was head of the Delta Kappa Epsilon fraternity. He was the head of the Delta Kappa Epsilon fraternity.   He was one head of the Delta Kappa Epsilon fraternity.  Which is right?