b ）arose
arose是arise的过去式,意思是出现
Many difficulties ——as a result of change over to a new type of fuel
Many difficulties ——as a result of change over to a new type of fuel
a)rose
b)arose
c)raised
d)aroused
a)rose
b)arose
c)raised
d)aroused
英语人气：877 ℃时间：2020-05-13 01:04:08
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