______ you keep moving, you'll never reach the top of the mountain.
句意：除非你一直保持前行，否则你决不会到达山的顶端。
考查连词。if如果；although尽管；unless除非。“you keep moving”表达的是条件，此处用unless引导条件状语从句，表示“除非,如果不”，相当于If you don’t keep moving。故选C。
______ you keep moving, you'll never reach the top of the mountain.
—Do you know the traffic rules?
—Sure, one of them is that we can’t go across the street _____ the light is green.
I waited ______ they finished talking.
Get up early, ______ you will miss your train.
Nobody can hear you ______you speak in a louder voice.
—I think I am the shyest in my class. What should I do?
—Be more active in class, ________ you can improve your ability to express yourself.
—Mary doesn’t like fish chicken
—Ben doesn’t like fish, he likes chicken very much.
The Chinese doctors went to Italy to help the patients________they knew it was dangerous.
_____ Jane_____ her brother is going to the movies this weekend. One of them has to stay at home to look after their sick mother.
— Work hard,____ your dream will come true.
—Well. 1 will do my best.
