托福考试

根据网考网考试中心的统计分析，以下试题在2019/1/17日托福考试习题练习中，答错率较高，为：67%
【单选题】 Areas of fertile soil called deltas, usually ______ are formed by mud deposited at the mouth of a river.
A．(triangular in shape
B．( their shape is triangular
C．( they have a triangular shape
D．( triangular shape

网考网参考答案：A，答错率：67%
网考网试题解析：
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