41~42. They lost their way in the forest and ______ made matters worse was ___________ night began to fall.
43. ____________we will go there tomorrow by train hasn't been decided yet.
44. ____________ of you comes in first will be given a prize.
45. I don’t think it’s my ____________ that the TV blew up. I just turned it on. That’s all.
46. ___________ days went by, he didn’t succeed in anything he had planned.
47. On my __________(arrive) at the airport, my friend gave me a big hug.
48. Using all their ___________(strong), the driver and the passers-by pushed the car out of the mud in the end.
49. The storm left, ____________ (cause) a lot of damage to this area.
50. How ____________ (believe) beautiful the scenery beyond the mountain is!
41. what
42. that
43. Whether
44. Whichever
45. fault
46. As
47. arrival
48. strength
49. having caused
50. unbelievably