根据网考网考试中心的统计分析,以下试题在2018/8/7日托福考试习题练习中,答错率较高,为:79%
【单选题】Although the habitat of the American beech tree is now confined to the eastern United States and southeastern Canada, () extended as far west as California.
A. where it once
B. once
C. it once
D. and once
网考网参考答案:C,答错率:79%
网考网试题解析:
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