参考答案

正确答案：C
解析：题型：词汇题。hang on坚持，拒不放弃，也可表示“依赖于”，比如：Everything hangs on the outcome of this meeting．这次会议的结果决定着一切事情。hang up推迟，耽搁，把……放一边，如：Budget problems hung up the project for months．预算问题使得该工程推迟了几个月。hang about游荡，如：Come on，we haven't got time to hang about．hang onto为及物动词短语，意为“紧紧抓住，依附，依靠”，如：She hung on to the side of the cart as it rattled over the stones．