在职申硕英语考试

根据网考网考试中心的统计分析，以下试题在2019/4/9日在职申硕英语考试习题练习中，答错率较高，为：88%
【单选题】A big problem facing people today is that ______.


A．they must tolerate phone disturbances or miss important calls
B．they must turn off their phones to keep their homes quiet
C．they have to switch from a desktop phone to a cellphone
D．they are too busy to make phone calls