While the total number of farmers engaged in the agriculture production is barel

游客2023-11-15  29

问题 While the total number of farmers engaged in the agriculture production is barely half ______it used to be in 1959, the size of the average farm has tripled.

选项 A、that
B、what
C、which
D、how

答案 B

解析 half what it used to be 相当于 half the number that it used to be,what既代替先行词the number 又引导一个从句,其他几个选择项均没有这个功能。
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