第30题: [单项选择]Unless all the members agree to ______ to the plan there may be further development in the course of action. A. tumble B. stick C. come D. adjust 参考答案:B 答案解析:stick to 意为“坚持;坚守”;tumble to 意为“突然察觉,突然明白”,如:“It was a long time before she tumbled to what I meant.