Question

Many difficulties have         as a result of the change over to a new type of fuel.

A．risen

B．raised

C．arisen

D．arrived

Answer 1

C

risen上升，不及物动词，raised举起，升起，及物动词，arisen产生，出现，arrived到达，句意：由于一种新燃料改变的结果，许多困难出现了。故选C。