In face of difficulties the climbers in the hope of reaching the top before dark.
A. insisted on
B. looked up
C. turned away
D. kept on
网友回答
A. insisted on
B. looked up
C. turned away
(答案→)D. kept on
解析：keep on可用作及物动词和不及物动词, 意思为 “继续”。句意：尽管困难重重，登山队员们继续前进，希望天黑前到达山顶。insist on为及物动词，意思为“坚持”；look up查寻，向上看；仰视；turn away转过脸去；转换方向。