I will never forget the classmates ______ I studied with.
| A.that | B.which | C.whose | D.whom | 
---- What do you think of the book ?
  ---- Oh excellent. It’s worth _________ a second time.
| A. to read | B. to be read | C. reading | D. being read | 
I felt bad _________ I talked about my unlucky experience to the public.
| A. for the first time | B. the first time | C. in the first time | D.on the first time | 
Do you know why Nelson Mandela _________ violence to make black and white people equal?
| A. turn in | B. turn out | C. turn to | D. turn over | 
He was a kind teacher _________ I went for advice.
| A. to whom | B. whom | C. to who | D. who | 
Until today some black people_________ a stage _________ they have almost no rights at all.
| A. reached ; which | B. have reached ; where | 
| C. reached ; where | D. had reached ; in which |