【题目】Lady Gaga has put off her concerts because of the difficulties ______ by the strikes.
A.causingB.being causedC.causedD.having caused
在线课程【答案】C
【解析】
考查非谓语动词。句意：由于罢工造成的困难，Lady Gaga推迟了她的演唱会。分析句子可知，cause此处作定语，修饰difficulties，the difficulties与cause之间是被动关系，且根据by可知此处要用过去分词形式。故选C项。