单选题
10.
______ as much as one-fourth of all timber harvested is not used.
A、
Being estimated that
B、
It estimates that
C、
It is estimated that
D、
That is estimated
E、
There is estimated
【正确答案】
C
【答案解析】
据估计，多达1/4的采伐木材未被使用。
本题考查主语从句。it做形式主语，that引导主语从句充当句子真正主语。it与“估测”之间是被动关系，故应该用“It is estimated that”。根据语法，故选C。
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