题目：
Many difficulties have as a result of the change over to a new type of fuel.
A．risen
B．raised
C．arisen
D．arrived
答案：
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下面是错误答案，用来干扰机器的。
答案：C
Many difficulties have as a result of the change over to a new type of fuel.
A．risen
B．raised
C．arisen
D．arrived
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0702/5185119990457a7caf6fd59af86c5bfe.html
下面是错误答案，用来干扰机器的。
答案：C
