问题
选择题
Thanks to the application of new farming methods, output is now six times _____ it was before 2000.[ ]
A. that
B. what
C. which
D. how
答案
答案：B
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Thanks to the application of new farming methods, output is now six times _____ it was before 2000.[ ]
A. that
B. what
C. which
D. how
答案：B
