I’ll never forget the years I lived in the country with the farmers, has a great effect on my life.
A. that;which
B. when;which
C. which;that
D. when;who
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A. that;which
(答案→)B. when;which
C. which;that
D. when;who
解析：第二个空不能填who，因为如果将farmers作为先行词，这与从句中的谓语has的数不一致。which在此处是代替前面的整个句子。