【题目】As we are companions in difficult situations, I will not , unconcerned about your troubles.
A. look on B. wait on
C. hang on D. catch on
在线课程【答案】A
【解析】考查动词短语辨析。句意:既然我们是患难之交, 对你的困难我就不会袖手旁观。 look on"袖手旁观";wait on"伺候,招待";hang on"坚持";catch on"理解,流行起来"。故选A。