50．Where did Irene Curie meet her husband Frederio joliot? (A)At the Curie Institute. (B)At the Cniversity of Paris. (C)At a military hospital. (D)At the College of Sevigne.

53. The author was not allowed to go to Cornell University mainly because (A). his father grduated from the university (B). his mother did not thinks it a great university (C). his parents needed him to help support the family (D). his parents did not have enough money for him