题目:
During the eighteenth century,widespread changes in agriculture, known as the agrarian revolution, involving the large-scale introduction of enclosed fields, of new farming techniques and crops, and the substitution of commercial for subsistence farming.
选项:
A、revolution, involving the large-scale introduction of enclosed fields, of new farming techniques and crops, and
B、revolution, involved the large-scale introduction of enclosed fields and of new farming techniques and crops, and
C、revolution, which involved the large-scale introduction of enclosed fields and of new farming techniques and crops, and
D、revolution involved the large-scale introduction of enclosed fields, new farming techniques and crops, and of
E、revolution that involved the large-scale introduction of enclosed fields and new farming techniques and crops, and of
答案:
B