单项选择题
1 （） into the dark, sure that I would finally reach the hospital.
A.workout B.setout C.makeout D.putout
单项选择题 The first step is to （） your problem and go to work on it.
单项选择题 （） all we have learned from space flights, the moon is still a riddle from the distant past.
单项选择题 I was exhausted when I reached home, and I flung myself down on the front steps to （）.
