【单选题】听力原文: We have just climbed out of a spaceship onto the surface of the moon. Behind us is the ship, half in the sunlight and half in deep shadow. A few miles ahead is a wall of mountains towering again...
【单选题】If it _____the snow, we _____the Simian Mountain last week A. were not, could have climbed B. were not, could climb C. had not been , could have climbed D. had not been, could climb