46．Though you stay in the sea for weeks, you will not____________(失去联系) the outside world.

47. Cancer is _________________(仅次于) heart disease as a cause of death.

48. It is a pity that we should stay at home when we have ______________(这么好的天气).

49. I would ______________(不会诉诸法律) a court of law if I hadn’t been so desperate.

50. John cannot afford to go to the university, _________________(更不用说出国了).

46. lose contact with

47. second only to

48. such fine weather

49. have never resorted to

50. not to speak of/not to mention/let alone going abroad