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问题: 单选16

Many people are dying each day from illness _______ smoking.
A. which cause B. which is causing of
C. caused by D. causing

解答:

翻译一下:许多人每天死于由吸烟引起的疾病.
这里为过去分词短语做定语.
AD缺少介词.又加上现在分词表主动.可排除.
"这种疾病"是由吸烟导致的,所以是"被导致".
"illness"为"caused"的承受者.所以用介词"by"
选C