题目

Forty-three years ago, a man took a “small step” on the moon and brought mankind a “giant leap” forward. As the first person to walk on the moon, American astronaut Neil Armstrong is a man whose name will be remembered for generations to come.But being the first is never easy. With so many unknowns about space at that time, Armstrong himself was astonished that Apollo 11 actually worked. He thought he and his partners had merely a 50 percent chance of a successful landing back in 1969.It was tough indeed. When the module (登月舱) was approaching the moon’s surface, the computer wa       ________ I can see, there is only one possible way to keep away from danger.        A. As long as               B. As far as           C. So far                      D. Despite