单选题 The old bookcase isn't really ______. Let's throw it away.
   A) able to use                         B) capable of many uses
   C) of much use                      D) of much usefulness
【正确答案】 C
【答案解析】“be of+名词”表示人或物的特征。use作名词，意为“使用(用途)”，不可数。