托福考试

根据网考网考试中心的统计分析，以下试题在2019/4/29日托福考试习题练习中，答错率较高，为：42%
【多选题】 Although beavers rarely remain submerged for more than two minutes, they can stay underwater ___fifteen minutes before having to surface for air.
A． as long
B．as long as
C．so long
D．so long that

网考网参考答案：未、知，答错率：42%
网考网试题解析：
暂时没有解析查看试题解析出处>>